How to Help Your Child Prepare for Their First Robotics Competition

Your child comes home with a robotics kit, a team assignment, and a competition date circled on the calendar, and for the next several weeks, every family conversation about it is about the robot: does it grip the object, does it cross the line, does it complete the mission in time. That's a reasonable place to put the energy. It's also not where a large share of the actual competition happens.

Most first-time robotics families don't realize that a real event isn't only the robot running its course on the field. In FIRST LEGO League and VEX Robotics Competition, two of the most widely used team robotics programs in US schools, a panel of judges also sits down with the team and asks them to explain, out loud, what they built and why. That interview isn't a formality tacked onto the robot's run. It often counts for as much of what a team walks away with as the robot's actual performance does.

That comes as a surprise to a lot of families who spent the weeks before competition almost entirely in the garage, tightening wheels and rewriting code, and never once rehearsed answering "walk us through your design process" out loud to someone who wasn't already in the room while it happened.

Why the Robot Isn't the Whole Score

In FIRST LEGO League Challenge, the division built for students in grades 4 through 8, FIRST weighs a team's overall recognition across four areas, split roughly evenly: Core Values, Robot Design, the Innovation Project, and the Robot Game itself, according to FIRST LEGO League's own judging materials. Three of those four areas, Core Values, Robot Design, and the Innovation Project, are scored entirely through live interviews with a judging panel, not through anything the robot does on the field. A team can build a robot that runs its mission cleanly and still walk away without recognition if nobody on the team can explain, clearly and specifically, what problem their Innovation Project addressed or why they chose one sensor over another.

VEX Robotics Competition runs on a similar logic. A Team Interview, typically ten to fifteen minutes with a panel of judges, asks students to explain their robot's design and their strategy for using it, and the notes judges take in that interview feed directly into award decisions. The Design Award, one of VEX's core judged awards, is built from exactly two things: the team's engineering notebook and that judges' interview, not from where the robot places in matches. Even the Excellence Award, the top honor at most events, layers judged criteria on top of a strong on-field record rather than replacing it.

The pattern across both programs is the same. A robotics competition isn't only asking whether the robot works. It's asking whether the students who built it can explain how it works, why they made the choices they made, and what they'd do differently, to an adult they've never met, on the spot, without their code or their notebook open in front of them.

What Not to Do Before Competition Day

Don't let the robot eat all the prep time. Build and code time is real, necessary work, but it's also the part of prep that's easiest to lose hours in without noticing, because there's always one more adjustment to make. If the interview never gets a rehearsal slot on the calendar, it won't get one by accident.

Don't hand the whole interview to your most talkative kid. Judges are specifically trained to ask questions across the team, not just to whoever answers first, and a team where only one member can speak to the robot's design reads as a team where only one member actually understood it. Every teammate needs to be able to explain their own piece.

Don't let the team memorize a script. A rehearsed paragraph about "our design process" falls apart the moment a judge asks a follow-up that doesn't match the script, and judges' follow-up questions are the whole point of an interview format instead of a presentation format. Kids need to know their project well enough to talk about it, not recite it.

Don't let a "lead builder" be the only one who understands the whole robot. It's common for one kid to gravitate toward the mechanical build and another toward the code, and that specialization is fine, as long as every team member can still describe what the other parts of the robot do and why they exist. A judge who asks the coder to explain the gripper shouldn't get silence.

Don't skip a mock interview because "we already know what we did." Knowing what you did and being able to explain it clearly to a stranger, under a little time pressure, are two different skills, and the gap between them is exactly what shows up on competition day if it's never been tested beforehand.

What Actually Helps

1. Assign each judged area to specific teammates ahead of time. Decide, as a team, who's the primary voice on the Innovation Project, who covers the robot's mechanical design, and who covers the code, so every judge's question has a teammate ready to take it rather than a group looking at each other.

2. Run a live mock interview with someone the kids don't know well. A parent, a sibling's friend, another coach, anyone outside the team who can ask genuine questions works better than a family member who already knows the answers and unconsciously softens the questions.

3. Practice explaining a failure, not just a success. Judges frequently ask what didn't work and what the team changed because of it, and a team that has only rehearsed the version where everything went right gets caught flat by that question. Pick one real setback from the build process and have the team practice walking through it out loud.

4. Anchor every answer in "why," not just "what." "We used a four-bar linkage" is a fact. "We used a four-bar linkage because it kept the arm parallel to the ground through its full range of motion, which our first design didn't do" is an answer that shows understanding. Judges are listening for the second version.

5. Rehearse standing up, away from the robot and the laptop. It's tempting to practice the explanation while pointing at the robot on the table, but the interview happens with judges asking direct questions, not with the team giving a guided tour. Practicing the same content without props gets closer to how the real conversation will feel.

6. Make sure every teammate answers at least one question out loud in every practice round. Rotate who starts, rotate who gets asked the hardest question, and don't let the same one or two kids field everything in rehearsal, because that's exactly the pattern that shows up in the real interview if it isn't broken first.

The Three Questions Every Judge Comes Back To

Across both programs, judges' questions tend to cluster around the same three things, whatever the specific wording. In our experience coaching kids through presentations that face this same live-questioning format, a team that has a clear, honest answer ready for each of these three is prepared for the large majority of what actually gets asked.

1. What problem were you solving, and why did you solve it that way? This is the design-rationale question, and it's asking for reasoning, not just a description of the final robot.

2. How does it actually work? This is the mechanism question. A judge wants to hear the "how," in the team's own words, not a memorized definition of the part involved.

3. What didn't work, and what did you learn from it? This is the reflection question, and it's often the one first-time teams are least prepared for, because most of the prep time goes toward describing what succeeded.

How TalkMaze Fits

TalkMaze offers 1-on-1 online public speaking and debate coaching for students ages 5 to 17, and the specific skill a robotics judging interview demands, explaining a decision clearly to an unfamiliar adult and holding up under a genuine follow-up question, is exactly what a TalkMaze coach drills session by session. Where a mock interview at home usually happens once or twice before competition day, a coach can run that same question-and-follow-up exchange repeatedly in a single session, with direct feedback after each attempt, so the real judging panel isn't the first unfamiliar audience a child has ever explained their work to.

Founder Ghalia Aamer is a national debate competitor, TEDx speaker, and Princess Diana Award recipient, and every TalkMaze coach trains on the method she built. Every family starts with a free 30-minute assessment, a live session where a coach hears how your child currently explains something out loud to someone new, so you get a direct read on where the gap is before competition day is already close.

This connects closely to our guide on preparing for a science fair presentation, which covers the same underlying skill, explaining real technical work to a stranger who wasn't there for any of it and can ask about any part they choose. For a student who wants regular reps building and defending an explanation under real, live questioning, TalkMaze's Odyssey program is built around exactly that kind of practice. Get started with a free assessment.

Frequently Asked Questions

Does the robot's performance matter less than the interview?

Not less, but not more either. In FIRST LEGO League Challenge, the Innovation Project, Robot Design, and Core Values interviews are weighted alongside the Robot Game's field performance, so a team that only prepares the robot and skips interview prep is only getting one piece of what judges are actually evaluating ready.

What age can a kid start competitive robotics?

FIRST LEGO League runs age-appropriate divisions starting around age 4, with Explore for roughly ages 6 to 10 and Challenge for grades 4 through 8, while VEX IQ covers elementary and middle school and VEX V5 covers middle and high school. There's no single right age to start; the right entry point is whichever division matches your child's current grade.

What do robotics judges actually ask in the interview?

Judges typically ask what problem the team was solving and why they solved it that way, how the robot's design actually works, and what didn't work along the way and what the team changed because of it. Specific follow-up questions vary, but those three themes cover most of what comes up.

Should the whole team answer every question, or just the team captain?

Judges are trained to draw answers from across the team, not just from whoever speaks first or most confidently, so every member should be ready to answer questions about their own part of the project. A team where only one kid can speak to the robot's design tends to read as a team where only one kid actually understood it.

My child understands the robot but freezes when asked to explain it out loud. Is that normal?

Yes, and it's one of the most common gaps in first-time robotics teams, because most of the prep time goes toward building and coding rather than rehearsing the explanation itself. Practicing the explanation out loud, to someone outside the team, closes that gap faster than more time spent on the robot alone.

What if a judge asks something the team doesn't know the answer to?

A short, honest answer, "we haven't tested that yet, but here's what we'd expect based on what we've seen," works far better than guessing or going silent. Judges are generally more impressed by a team that's clear about the edges of its own knowledge than one that tries to bluff through an unfamiliar question.

Is VEX or FIRST LEGO League better for a first-time team?

Both are well-established, widely available programs, and the better fit usually comes down to your child's grade and what's offered locally rather than one program being stronger than the other. FIRST LEGO League tends to be the more common entry point for elementary and early middle school, while VEX IQ and VEX V5 pick up from upper elementary through high school.

How long before competition day should interview prep start?

Start interview prep as soon as the robot has a working first version, rather than waiting until it's finished, since early practice explaining an unfinished design is what surfaces the gaps in understanding while there's still time to close them. Waiting until the week of competition to rehearse the interview usually means the first real explanation attempt is the one that counts.

The Bottom Line

A robotics competition tests two different things at once: whether the robot works, and whether the kids who built it can explain it, clearly and honestly, to a judge they've never met. Most first-time families put all their prep time into the first half and almost none into the second, and the second half is often worth just as much. Assign the judged areas to specific teammates, run at least one live mock interview with an unfamiliar adult, and make sure every kid on the team can answer what they built, how it works, and what they learned when it didn't. Book a free assessment and give your child a real practice round explaining their work under questions before the judges ask first.