The set of NatureROCKS Preschool Age Stepping Boulders comes complete with three small boulders for children to sit on or hop across. Although they are made to look identical to natural boulders, they are actually built from glass fiber reinforced concrete. They have a coarse texture and hand painted coloring which is made to look as realistic as possible, even up close. Their shape looks just as if it were shaped by weather and erosion; although they still have a somewhat flat top so that they can be comfortably stood or sat on. Place the three boulders next to each other so that children can jump from one to the next, or nearby larger NatureRocks boulders to complete the natural decoration. The boulders in this set are each roughly 8 inches tall, and 24 square inches at the base, making them safe for children as young as two years old to play on.