My baby likes to play with hair. Both mine and hers. She pulls it, twirls it and enjoys running her fingers thru hair. Is this normal?

Lots of babies like to soothe and entertain themselves by pulling, twisting, and patting mom's hair. It usually starts around 6 months, when they're mastering hand control -- and often while they're eating, since that's when they're close enough to really take hold.