In the mornings or after naps, if Will wakes up first, he always wants to go get Katie when she wakes up (he often peeks in her room to see if she is awake). Once we know she is up, he will tell me that he will go get her and jump with her.
He climbs in her crib, throws all her toys out, and they jump! They both love it - not sure who has more fun - Will, Katie or me. I just love watching them and hearing their laughs. You can see from the pictures how much Katie enjoys it!