5 Dangerous things to do with your child. The link above is to a web video by some inventor-type guy. He feels kids nowdays are overly-protected and it's stunting their intellectual growth. He suggests parents should let kids (second graders and up) do the following things.
Note: he does not suggest they be allowed to do the following unsupervised or without any safety instructions!
1. Play with fire (my personal favorite)
2. Use a knife
3. Throw a spear
4. Take apart appliances (old appliances!)
5. Drive a car
-Blast