The most common victims of dog bites are children (especially boys) between 5 and 9 years of age. This doesn't mean that kids should never play with dogs, but they need to be taught a few "do's" and "don'ts". Check out Dr. Yin's suggestions for ensuring safe interactions between kids and dogs.

http://drsophiayin.com/blog/entry/kids-and-dogs-how-kids-should-and-should-not-interact-with-dogs