Elenco 21-881 Sound Reversing Car
This kit is a low-cost implementation of the common introductory robot that backs up and turns when it hears a sound or hits an obstacle. The kit is quite basic, but because the instructions do not provide soldering instructions, we recommend this kit for someone who has completed at least one previous soldering project.
The kit consists of a painted plywood base, a printed circuit board, one motor and gearbox, and a battery holder. The robot runs off of two AA batteries.
If you want to learn how to solder, see the Learn to Solder Kit.
Note: The Elenco sound reversing car is a kit; assembly is required. This kit requires soldering. Two AA batteries are required but not included.