Using this playset is easy and fun. First, set up the The Joker Funhouse in a place where it won't get knocked over easily. Attach the water - squirting backpack to either Batman or The Joker figure. Fill the water areas of the playset, like the dunk tank and the pendulum, with water. You can adjust the water temperature to see the color - changing effect. When you're done playing, empty the water from the playset to prevent mold. Store it in a dry place to keep it in good condition. Always supervise kids aged 3 and up while they play to make sure they have a safe and enjoyable time.