[beelzepug]

I had one of those (an Erector Set, not an erection) when I was a boy. My Dad passed it down to me so it was probably from the late 20s or early 30s. I had more fun and learned a lot about construction, levers and pulleys, gears, and electric motors. Wonderful toy.

[BlueLancer]

"I had one of those (an Erector Set, not an erection) when I was a boy."

Well, I never had the former, but I had plenty of the latter ...