I have a couple of the Fresh Flow I think they are called. The water runs down the ramp rather than just dropping off the edge. They are much quieter than the dropping ones. But if you like the sound of water running all the time then the dropping ones would be good too.

For Christmas we got our cats a toy called a Turbo scratcher...I think that is the name...they are a large plastic ring with cardboard in the middle with a ball that runs around the outside. All four of my cats love it. Besides the catnip mice and the catnip bags and the furry mice and string of any sort that is the only toy that all four of my cats have liked.

Denyce