Baby seems to have an affinity for hair

We had our weekly class at My Gym this morning, and Baby was very interested in pulling on the hair of the little girls in class today, who each had a pretty foo-foo in their hair. By the end of class, not a single girl had a foo-foo in her hair. Baby chased after them, and was faster than most, being the largest baby in class today. He had a good time, and the other moms were very understanding, thank goodness, about his fondness for grabbing hair.

So, the question remains: how do I make Baby stop? I know he's curious, and that's why he's pulling hair, not because he wants to hurt the other babies. I mean, he pulls my hair, too. But he's not even one yet. How do you discipline a baby that young? Do you even discipline a baby that young? He doesn't understand that kind of thing yet, I think. I don't know, maybe I'm just not experienced enough yet. And better yet, maybe it's a short phase that he'll get over. That would be wonderful.