Abstract: A set of round support weights connected by a hollow horizontal bottom support having perforations so that the bottom support can fill with water and not be buoyant can be connected to a crib by vertical supports engaging corner vertical rails of the crib, the crib consisting of an upper rail, a bottom rail and vertical rails connecting the upper and bottom rails with a floor clamped to a bottom of the bottom rail. A set screw can secure the corner vertical rails to the upright supports and adjustable coping locks attached to diagonally opposite corners of the upper rails of the crib can secure the upper rails of the crib to a coping of a pool, so children of different ages may be able to use a pool while their parents are free to use the pool at the same time.