My guys will play with most anything too. The all time favorite in our house is the SUPER BALL!! They love to play hockey or pick the ball up in their mouths and drop it. It will bounce and roll and the attack is on!! They do play with their mice as long as they have long fur or feather tails, straws are also a big favorite. Then the usual stuff, a couple gazillion water caps, milk rings, plastic tops from my hairspray bottle.