Cat springs are very light, so they skitter unpredictably on hard floors. AWESOME. She can whap them around and chase them and pounce on them. THE MIGHTY HUNTER. She can growl at them, although we're not sure why she growls at them. GRR.

She can carry them around in her mouth and leave them in the hooman bed because she's never seen us hunt and thinks we need looking after. We can't say for sure that she's wrong.

Cat springs are the best.