The Water Sports Monster ball is a unique underwater ball that has neutral buoyancy, meaning it can be used underwater to dribble, pass, etc All underwater. Instructions: step 1: fill monster ball: remove ball and hose filler nozzle. Attach the filler nozzle to the hose. (Do not turn on water). step 2: insert the filler tip needle into the valve of the monster ball. (Be careful not to push needle through the side of ball) step 3: Turn on water to the hose and then go and support the ball as it fills. Once ball is AP- proximately 9” in diameter, turn the water off and remove the filler tip from ball. Step 4: Remove the filler tip from the hose. Carefully Reinsert the filler tip back into the ball so the filler is upright (see photo) adjust the amount of air in the ball to control desired buoyancy and you are good to go. Step 5: Place monster ball in the pool and it will sink to the bottom and slowly rise to the top. Step 6: have fun... Dribble it, pass it.. Come up with up your own games to play. Warning- the ball is heavy when filled, do not throw it outside of the water!