I found this website recently created by the University of Ohio Veterinary college. There´s lots of great info and advice for users who have indoor only cats.

http://www.vet.ohio-state.edu/indoorcat.htm

This excerpt is from the Toys section:
"There are many different kinds of toys; you could buy me some of these, or make some yourself. Because of my heritage, I like toys that do something. Toys that squeak, chirp, jitter, swing or vibrate remind me of moving meals, enticing me to interact with it. The first toy you might try is a furry mouse that makes noise and moves. Some even have catnip in them! You can just roll it past me on the floor to catch my attention; I´ll let you know if it looks like lunch. Since we´re each individuals, some of us like some toys better than others. Just offer us a few and we´ll show you what we like! "

I encourage you to check out this site. It´s better than most, and discusses just about every issue that indoor cat owners on UC have asked questions about.