A cool thing to do is acting out something and then pretending that you accidentally fall in. What you do is act something out like you are walking on a beach. Then you pretend that you fall in the water. One thing I do is pretend I am reading a sign that says " Do not go in the water" and then I fall into to the water. Other times I act out a seen from a movie like " Pirates Of The Caribbean" when Elizabeth falls into to the water. Or you can even pretend somebody pushed you into the water. It is really fun!
Another awesome game is Splash. Your goal is to make as many waves as possible in your pool. You can kick around. Or you can jump around. You can even jump in the pools. You will start laughing after you do it because there are so many waves.
These are some ideas that I love to do with my friends. So you should try it out. Have a great time in your pool or even somebody else's!