Finally my 2 children were present still got to swim in it but it is reassuring that requiring the presence of an adult. Rollover it is impossible for the child to regain the starting position. Attention never buoy at the beach prefer armbands. In this buoy pool is useful to have the free arm. My 6 year old daughter who can swim breaststroke gives it occasionally. My 4 year old son knows also swim s' on.