Here's an example, he was playing rather wildly, but the pictures don't show it.
No! It got away from me!
Still not close enough.. come on!
I got it! But hey, there's all kinds of toys behind me...
If I roll over here, you have to flip the bird farther. Come on, quit being lazy mommy..
Ha! I got it again!
That's my boy, wild for a few minutes, lazy and rolly for another few, then shortly after, nap time!