WOW this is the BIGGEST beach ball I've ever seen! I inflate it with my foot pump, and also with my mouth. I sit on my clear inflatable foot stool while I inflate the ball. It looks like it's going to burst! I'm a big lady! Haha I also step and kneel on the ball, and I think it's going to pop because I'm so big! Thankfully it didn't so I could go on to play with it some more. I bounce it and hit it around in the air. I also inflate it a little more when I notice it's deflated a little. I really love to sit on it and bounce!