7 years & up. Construct tracks of tunnels, funnels, ramps, and chutes, then set the ball rolling and watch your creation come to life. The open-ended, no rules play promotes experimentation, creativity, and problem solving, which are key mental skills for aspiring young engineers and architects. As children build through trial and error, they gain an early understanding of physics and engineering concepts like balance and structural stability. No glue and no connectors means structures are vulnerable to collapse, but this teaches children to build with care, honoring fine motor skills and dexterity in the process. Set includes: 200 pine planks, 2 KEVA® balls, and an idea booklet.