What are some of the most common causes for childhood injuries?

I got alot of bruises on my feet and toes as a child because I always seem to ram them into hard objects by accident whenever I walked. I grew up in a house with lots of children (siblings and cousins) so there were always toys lying around and I get a lot of bruises from stepping on them, falling over because of them and especially ramming the middle of my fourth and fifth toe into the table or chair.