One of our cats' favorite toys is the popular Madcap Mouse plush from SmartyKat. This is always our Timmy's favorite toy, but he shows added interest when we add a bit of dried catnip from our stash. Yep, Madcap Mouse is refillable! These kinds of toys will attract your cat initially and then again and again as you keep the catnip pouch filled with the good stuff. Here are 10 great refillable catnip toys for cats.