I could only afford the 20-in-1 kit with my b'day money (after begging for the 75-in-1). I also had a grandfather that would give me various things like a tran

I could only afford the 20-in-1 kit with my b'day money (after begging for the 75-in-1). I also had a grandfather that would give me various things like a transformer and a complete photoelectric sensor with the wall control box. I also disassembled most my toys to see how they worked (could never get them back together again).