Very simple design. For someone who has never done line following before, this would be very cool. The calibration shouldn't need to be done every time.

Pretty easy to build. It was surprising that you had to use 3 motors, but I understood after seeing it work! Some of our team members added a paper tutu to make it look more authentic (a paper coffee filter).

Fine design, great for younger kids! One of the teacher's came in with her little girl and she REALLY liked it. The fact that it fell apart and pieces went flying was a bit scary, but I guess it was designed to do that.

Only negative comment is that the gear to change to the explosion sometimes got stuck in between. Not sure how to fix that.

Very easy to build. About what we expected.

Warning: don't turn the motor too fast because the gears in the motor could get destroyed.

Pretty easy to build. Worked way better than we thought. If possible, a reverse would be cool.

Works good. The continuous brake sound got annoying though!

We modified the arm by angling the pickup with an "L" so that it could pick up more stuff much easier.

Fun robot.

I expected the radar to be checking all the time on all sides... perhaps a limit switch to tell it when it's all the way to the right or left would give it a frame of reference.

Very cool idea, but t doesn't work well with a couple people talking about it in the same room.

Maybe a sound sample at the beginning to determine zero level?

Does not work well on sand.

Actually, it was pretty fun, but didn't go as fast as we thought it would. I geared it up more and made it faster.

The bumper car is fun!  It runs faster that we thought it would.

It would be cool if you could "double-tap" or something so it goes reverse. But other than that it was really good.