Sharks are the coolest. And sharks that shoot water? Discovery Kids’ Battle Blaster Hammerhead is an inflatable pool shark complete with a 180-degree rotating water cannon (taking “ammo” right from the pool, so no need for refueling) and puts other water toys to shame. Discovery Kids reports good pre-orders for the summer season. This thing will turn any sunny day into Jaws: dum-dum ... dum-dum-dum-dum!