It’s normal to feel hyper-protective of kids, but think back on all the crazy stuff YOU did, and you made it through okay.  Well, mostly.  Buzzfeed has a list of things people say they did as kids, and then later, as adults, realized were really dangerous.  The highlights include:

Catching and playing with spiders
Shooting fireworks at friends
Destroying stuff in old buildings with asbestos
Goofing around with lawn darts
Jumping off the roofs and lofts of sheds and barns
Putting a car in neutral while in a parking lot
Messing around on streets or roads at night
Climbing more than 12 feet up a tree
Fooling around on staircases
Walking out on a frozen pool or pond
Sticking things in electrical outlets.

(Buzzfeed)