We've had our for ages... the 300 model, which I think was the top of the line at the time.
My boys hadn't played with it for a while and then DS8 was studying electricity at school early this year and became totally, totally obsessed (as he does)... so much he eventually convince my DH to take him to the hardware store and he built his own circuit board (with plywood, batteries, nails, wire, etc.). It won him a cash prize in a state-wide science talent search & Snap Circuits was a big part of the inspiration :-)
