Sound Reversing Car Soldering Kit Elenco 21-81
This robot will move forward unless the built in microphone detects a signal such as a hand clap or the robot bumps into something. At that point it will reverse and turn left for a few seconds and then continue forward.
Requires assembly and soldering. Intermediate knowledge of soldering required, ages 15 and up (contains small parts that are bad for small children).
Requires 2 AA batteries not included.