Marble GeniusMarble Rails Extreme Set, 625 Piece Marble Run for Kids 8+ (55 Marbles, 80 Rail Pieces, 20 Base Pieces & More), STEM, Full-Color Instructions, Great for Kids & Teens

Marble Genius Marble Rails Extreme Set, 625 Piece Marble Run for Kids 8+ (55 Marbles, 80 Rail Pieces, 20 Base Pieces & More), STEM, Full-Color Instructions, Great for Kids & Teens

Marble Genius Add-on Accessory Marble Rails Automatic Chain Lift, 1 Piece Marble Run for Kids 8+ (Requires 2 AA Batteries), STEM, Great for Kids & Teens

Marble Genius Marble Run Pipe & Sphere Accessory Add-on Set - 10 Pcs Total (4 Pipes, a Ramp, 5 Spheres), Alternating, Straight, & Tubes for Creating Exciting Mazes, Tracks, Runs, and Races