Festus (my spayed girl) sometimes puts her toys in the water dish. I thought it was her way of keeping them away from Garfield at first!
But she also loves shoving them under the stove so she can fish them back out. I guess it is just fun sometimes to splash around in the water dish, fishing for a crinkle ball!
She also plays fetch with her crinkle ball, by bringing it up to us to throw or flick across the floor so she can chase it! Isn't there a song about that called Cats Just Gotta Have Fun?!?