Flip the upper tread over and this kids step stool converts from two steps to one, dropping the standing height from 10-in to 4-in as a child grows or moves from the sink to the toilet. Rounded side handles give small hands something to grip on the way up, and textured treads plus rubber floor pads keep both the feet and the frame from sliding on tile. The triangular HDPE shell holds 66 lbs yet weighs only 5 lbs, so a preschooler can carry it from bathroom to bedside. Plastic thumb screws assemble it with no tools.