Feather wand, or really any toy with feathers.

Small spongy soccer balls - good for rolling down the hallway and under dressers!!

They both love their Snugglebugs. We have the one in the picture. and one that's a black "ladybug." Tito and Sophie love them!! They crunch when kitties bite into them.

Here's Tito with his Snugglebug: