Ahhhh, the Gilbert Erector Set. Yeah, I know what you're thinking. It's not that kind of erection. This kit came with a whole bunch of metal pieces and about a bazillion little screws and nuts and an ELECTRIC MOTOR to power whatever you cared to build. Imagine how fast you could put this stuff together with one of today's power screwdrivers! I spent hundreds of hours screwing around with one of these sets.