I used the Speedo bathing suits (my girls loved them and called them their blow up bathing suits, or their pregnant lady bathing suits..lol)that Target sells for my older 2 girls and now my 2 yo is using one..at first they would put on their bathing suits and i would put swimmie arm band thingies (lol) with them until they got used to the water and learned to swim, then slowly i would take off the swimmies and then eventually take out the front blow up part from the bathing suit, then after they were comfortable the back came out..My 6 and 5 yo were both swimming on their own at 4 yo..they are great!!!