Fee - sounds like Cooper is the leader of the group! Danielle's just a slacker! Tummy Time she just lays there, playing with her she just smiles but she does seem to talk more during Nuddy Time. She has whole conversations with Ken.
Oh don't worry - Cooper is not the best at tummy time. He rarely lifts his head. He just lies there!

But on his back he goes crazy!

I haven't tried any nuddy time with Cooper. I'm scared he'll "shart" everywhere. LOL. It's probably a good idea to do some though. Might have to try it soon.