quite a lot,actually
LOL Since I loved biology as a small child, parents gave me a dissection kit, complete with preserved specimens (like a crayfish) and a surgical scalpel. What were they thinking? I used to pester my parent's guests for blood samples for my slides.
I love chemisty equipment. Some maniac gave me a chemistry set when I was 6. Alcohol burner included.
Me too. Probelm was I was fascinated with fire. I figured it has to be some sort of material that glowed. Something created when things burn. So I wound up throwing different chemicals into open flame looking for reactions one day when my mother was out. Found a few, and took out a set of curtains in the process. Nothing sufficient to figure out WHAT it was that was glowing, though.
Still have have a scar from my mother's reaction. 
What about the stuff you didn't mention?
haha :-) There might be some underwear or something too
less said the better
:looks around nervously before stamping down on his lumpy,lumpy carpets:
Beware the evil furry dust bunny monsters. They sometimes move without a breeze.
{sneaky look to the left}
{sneaky look to the right}
ha ha ha. We packed up all our soft goods to move to the other side of the US a few years ago and still use them for basic packing.

Probably the occasional sock, shoes my husband has probably already replaced since he's too disorganized to have his shoes in one place... and probably about a hundred pacifiers... my baby liked to throw them and then scream so that we have to wake up in the middle of the night to find said pacifiers. I haven't looked for them since... I'm pretty sure I finally cleaned up all the extra old bottles... icky.
Hehe. Discovered our poodle had stolen and hoarded my niece's bottles under the couch. Clearly a covert milk sucking operation.