Hannah (especially) and Tucker like to catch the ball, however, and ordinary tennis ball is a little too big for them. Recently we've found tennis type balls at PetsMart that are slightly smaller. We know have 12 in total although we generally don't know the location of all of them. Hannah loves to catch them in rapid succession.

Her other favorite is the Zap ball which will light up and make *wacky sounds*. Anyone thinking of getting this, test it out while at the store. I have had lots of bad luck getting duds and even if it isn't a dud, the lighting up and wacky sounds don't last very long.