Along with all other veggies in the cruciferous family, broccoli is important because it contains natural substances that may help the body fight certain cancers.
Broccoli also helps heal kids' cuts and wounds—it's a particularly good source of vitamin C.
And, for a vegetable, broccoli can't be beat in helping build strong bones and teeth (it's one of the best nondairy sources of calcium—better absorbed by the body than spinach).