New, exciting and challenging balancing system. The elements can be combined in countless ways so use your imagination to set up all the balance courses and landscapes you can build. With the great flexibility of Build N' Balance, the level of difficulty can be varied to suit the development levels of the children and can be built at heights ranging from 4" to 9.5" - depending on how brave the children are! Set includes 2 of the 4" tops, 3 of the 9.5" tops, and 5 planks. Grades Pre-K+, Ages 3+.