Quercetti SKYRAIL Medium Suspension with Motorized Elevator (item number 6645) ($79.99). This 360 piece suspension set includes a battery operated  marble elevator that allows users to create endless and mesmerizing cascades of marbles. With 30 feet of glow -in-the-dark track, spectacular structures can be built by copying the examples illustrated in the detailed instruction booklet or by inventing whatever your grandchild's personal creativity and building skill suggests. Includes a detailed instruction booklet. Perfect for demonstrating gravity, speed, inertia, centrifugal force and other principles of mechanics and physics.

To order call 800.445.8347 or click here.