Cats can see things we don't. Cats rarely, if ever, blink. Therefore cats must see Weeping Angels that have somehow made themselves invisible to our eyes. Also by that logic, my cat has saved my life multiple times. yet another thing cats are good for.
Set of 3 Floating LED Pool Speakers. Simply toss the waterproof speakers into the pool and start the music, transmits wirelessly via from a single bass station. When not in the pool, the speaker work equally well on dry ground.