Jack has decided to be a dog most of the time he's at home. He thought it would be nice to have a doggie name, too, so we named him Rex. In fact, if he's in his dog mood, don't you dare call him Jack. That makes him mad, and he'll only answer to Rex.
Rex even fetches, too. Throw him the ball, and then he'll go and get it and bring it back.
Anna didn't want to feel left out, so sometimes she'll pretend to be a dog, too. Her dog name is Cindy.
Isn't imagination great?