I really can't remember. We had a pool growing up and I was pretty much always in it. I do remember before I could go into the deep end, but I had this floatie I would use - two benguins with a seat between them but I would hang on to the seat. I did once slip off and this was before I could swim, so my grandmotehr jumped into the pool to save me. I don't know exactly how old I wass, but I'd guess about five since I can actually remember that. Afterwards, I can only remember swimming like a fish and jumping off the diving board.