DisneyAddict_M and Sherri- I found them in the pet food/supply aisle at the local supermarket. They're called Kookamunga Catnip Bubbles.
Henry is such a baby, and most cat toys scare him, but he loves the bubbles! His very, very favorite thing to play with are the tiny, fuzzy mice that come 3 or 5 to a pack. He likes to decapitate them, leaving the head in one room and the body in another.

Any toy that is too big or makes a noise scares him.