This water based, competitive game will keep kids entertained and excited! The game is played by crouching underneath the balloon chamber while you rush to pump air and allow water to simultaneously fill the balloon that hangs above your opponents head and pop it before they beat you to it. The Hydro Blaster is a great alternative to the dunk tank and uses a lot less water! Can be used indoors without water as well. Balloons included (comes with 100, additional available for purchase), customer must provide water source and hose if using with water.