LOL I have two, and it isn't just the 'its mine' game with them - they also play 'its yours'. They aren't interested in a toy unless the other wants to play with it! Doesn't matter what it is, either!! I can give them both the identical toy, and they only want what the other has. Dublin, in particular, prefers to have ALL the toys! I can't help but sit back and giggle at them!
