Put the laws of motion to the test with our patented Q-BA-MAZE 2.0 Stunt Sets. The ingenious pieces interlock in endless configurations, while double-exit cubes keep you guessing which way the marbles will go. Starter Stunt Set features 56 cubes, 1 Speed Sprocket, 1 Roto Catcher, 15 steel marbles and instructions for plenty of super spinning action. Mega Stunt Set includes 108 cubes, 2 Cascade Stilts, 2 Coaster Tubes, 1 Marble Vortex, 1 Pivot Trampoline, 30 steel marbles and instructions. The Ultimate Stunt Set features every stunt in the Q-BA-MAZE arsenal plus three exciting additions: the spiral sphere, quad-exit cubes and marble catchers. Watch in awe as marbles fly through the quad-exit cubes at random and swirl through the teal spiral sphere. Ball catchers included!Keep the Q-BA-MAZE fun rolling with this 20-marble pack. Extra marbles are a must for Q-BA-MAZE—one of MindWare’s top-selling engineering toys for kids! • Strengthens STEM thinking and builds key logic skills• Use the steel marbles to test Q-BA-MAZE configurations • 20 premium steel marbles in a ripstop nylon drawstring bag• Marbles are nickel plated steel balls. They are not magnets.