Using the Nerf Super Soaker Mega Dunk - Fill is a breeze. First, find a water source. Dunk the tank into the water, and watch as it fills up right away. Once it's full, you're ready to play. Hold the blaster firmly, and pump the handle back and forth to shoot water at your target. Use the scope to aim better. When you're done playing, empty any remaining water from the tank. Keep the blaster dry when not in use. If it gets dirty, you can gently wash it with mild soap and water. Make sure to dry it thoroughly before storing it. This blaster is for kids aged 6 and up, so adult supervision might be needed for younger kids. Have a great time playing with your Nerf Super Soaker!