I wanted to be a paleontologist and was obsessed with rocks. I would "collect" them by taking them from anywhere I could find if they looked different or cool, and this so happened to include random neighbor's front yard stones to add to my collections. My mother would get pissed when she'd find them and recognize where they came from.

I uh... was not the best child to be given a chemistry set.
kinda self explanatory really

But tbh the biology set was worse, when I found out it had a scalpel for making viewing slides (microscope) i uh... got a little carried away with sample hunting <_<
So that got taken off me before the day was over.

Although that kind of idiocy is actually not too uncommon, I'd say the weirder shit (see: More retarded) was how I used to go around the garden picking poisonous plants and mashing them up into a sort of mixture which I soaked, then put into water guns.

I was a weird little bugger.