Plenty of activities means plenty of fun on the Smart Play®: Cube® structure. We recognize there are huge developmental differences between a 2 year old and a 5 year old. Because of this, the Smart Play: Cube is a smart choice for all children (under 5 years), packing 14 activities into a compact space keeps them busy and entertained in a safe and developmentally-appropriate way. Smart Play: Cube 2-5 has a unique look, bringing a sculptural, modernistic feel to your play space. In addition, its compact footprint will fit into tight spaces, and the affordable price will fit tight budgets.