Get your imagination rolling faster and further than ever imagined. There's no limit to what you can do with the Q-BA-MAZE Ultimate Stunt Set. Build, bounce, adjust angles, fine-tune turns and experiment with cause and effect to see what kind of zany, zigzagging action is possible! Part art and part science, the full spectrum of colors and a complete range of stunts allow for endless construction possibilities in both form and function. The Ultimate Stunt Set features every stunt in the Q-BA-MAZE arsenal plus three exciting additions- the spiral sphere, the four-way exit cubes, and eight marble catchers. Watch in awe as marbles fly through the four-way exit cubes at random and swirl through the exciting spiral sphere. Say goodbye to those runaway marbles-the new marble catchers neatly collect marbles at the bottom for easy removal. Use your critical thinking skills to stack and interlock the translucent pieces in a way that creates an advanced marble maze. Building the ULTIMATE maze is only half the fun. Grab your friends for a marble race-off! Expand your hand-eye coordination and spatial reasoning skills with every roll, twist and turn-all while having a blast!