A: I think it's more like she magically divided the towel Trixie was wearing into several smaller ones, and B: darn right it is. Magic is magic, and magic towels are fine and dandy, but that's just standard witch/wizardry. Puddles in midair, however - that's INTERESTING, because it subverts elementary logic, and when elementary logic is subverted, then there's something rotten in the state of Denmark.