When did your baby start hitting toys with their hands?

My little girl is 13 weeks today and I'm just wondering when she might start connecting her hands to her feet and her toys? She notices the dangly toys that hang from her bouncer and swing...she stares at them, but hasn't started playing yet. She's rolling over, starting to sit up, giggling here and there and babbling a ton...but hasn't figured out the grabbing things yet. When did your baby start to do this?