Capsela Building Sets
We hate to admit it, but those of us here were too stupid to have this toy. This was one of those engineering-nerd-erector-set-on-steroids construction sets that had gears and propellers. Some of the models could even go under water. There were capsules for electric motors, gears, switches, and pontoons. Other major parts included wheels, propellers, impellers, lights, wires, etc. Each kit, which had set numbers like 135, 150, 200, 250, etc., came with between 30 and 108 parts. Some of he more sophisticated sets could be programmed with computers, and some featured voice command. At the time of this writing, a company called IQ Key had re-branded the concept, and their version was compatible with the original.