Charles isn't laughing either, but only because it would come out as giggling, and he's managed to press this down to just a grin, heedless of bruises and other complaints. Otherwise completely enraptured by this impossible thing, although not enough to miss that.

"Well it can't be a shoe anymore. That'd just be wrong. Can I touch it?"

Sedately idealised monkey-cat seems like it could be up for pettings, so Charles does exactly that, sort of gently patpatting before delivering a stroke down its spine as if he would with Alex's cat. (Charles is more of a dog person, but he can adapt.)

"Though I suppose the spellwork will-- degrade? After a time."