This 3D domino ball orbital building blocks will keep little ones entertained for hours. Build your tower and customise it as you want then watch the ball fall through your domino maze until it reaches the bottom. The assembly is simple and builds developmental skills, hands on skills and problem solving skills. With fun designs like the whirly funnels, curved tracks and propellers, kids will be kept engaged. The quality material comes in bright colours and is non toxic and with smooth edges.