Cat-tastrophe

Clifford has guests - the kittens Flo and Zo. He's excited that they're staying for the entire weekend, but both Norville and Daffodil warn him that their energetic nature could lead to big problems. Once they arrived, things go exactly as feared, when they want to play constantly and even eat Clifford's food. The final straw comes when they break Clifford's squeak-toy and don't even seem to care. Can anyone get them to slow down and consider the conseqeunces of their actions before they ruin everything?