I guess this really is the start of them playing together. Last month it was with Ryan's Bogey Board, now it is hide-and-go-seek.
Ryan hid in Jillian's room and she came looking for him when he called her name. First, she stood up on her tiptoes by the crib looking in it and over it to see where he was.
With a little help from Mama, she started looking under the crib. Found you!
Let me come under, too!