I received a Dinky Joe 90 car for my 5th or 6th birthday. It was cool, it had a jet engine exhast that flashed, and spring driven wings that popped out.
I immediatly took it apart.
I spent hours trying to get the spring mechanism in place and the toy back together again. Finaly in tears of frustration, I broke down and brought the disassembled car my father. An hour later, he and my brother (5 years my senior) returned the toy (in one piece) with a stern warning to never do that again.
I promptly took it apart again.
I had it back together again in about 15 minutes. Knowing it could be done was all it took – yeah, I was that kind of kid.
I also had the Dinky UFO Interceptor – now there was one really cool toy!