I agree - it is hard for me to get all 3 cats playing at one, it seems someone is always left out.

A cool toy is a lunge whip (for horses). I noticed how much the barn cats liked to play with mine, so I bought another one for my cats. They are fairly cheap (don't get teh nice $$ ones, cheap one made of plastic are about $6 - $8), at farm supply stores, they are about 4' long with a long lash. The neat thing is I can sit in a chair or on the couch and they reach a long ways. Just make sure you don't have any breakables nearby.

Even old lazy Bo enjoys chasing the lunge whip lash.