This inflatable toy comes with a water cannon on top, and makes for a great poolside float for tiny tots. The water cannon can be rotated 180º to shoot your target of choice, and it would be pretty much impossible to drain the entire pool shooting people, giving you the advantage of unlimited ammunition. The Battle Blaster Hammerhead retails for $24.95. Adults, it looks like you’ll have to (literally) sit out on this one.