I bought the cats a package of plastic spring toys for $1. I showed them to the boys (Boudicca was uninterested) and threw them across the living room. The boys LEAPED after the springs like they were auditioning for Cirque du Soleil. Such elation and excitement! Now the boys are batting the springs ALL over the house. I expect that these springs will wind up in every nook and cranny for the foreseeable future.