Try splitting your time between SIX cats!!! I try to do a group "playtime" with mine. The older ones sometimes join in (although at this point, Casey is still protesting the move to Michigan by hiding). They LOVE the teaser wand and it poops them out.

Sometimes I will also take one kitty out at a time and give them "mommy" time individually. Even if it's only for 5 or 10 minutes each, they seem to be happy.