Water tank

My robot will have kids go outside and have fun and smile in a water battle. My robot will need a remote that need batteries and the tank will have a rechargeable battery that powers the camera and water sprayer. The robot will be made out of recycled plastics and have metal axles for the wheels so they won't bend as easy. It will contain 5 10 oz water containers 2 on each side and the one on the top that will use the water.