Experience the full spectrum of marble-run creativity! The Q-BA-MAZE is a unique system of interlocking colorful cubes for a fascinating new marble-run toy. The configurations are UNLIMITED and the rainbow-hued colors are BOLD and BRIGHT, offering your child a challenging and mesmerizing experience that’s as beneficial as it is fun. Encouraging fine motor skills, logic, creativity, and an interest in physics and art, this set includes double-exit cubes that will introduce the science of probability and leave everyone wondering, "Which way will the marbles go?” With the Q-BA-MAZE, you can create fiery dragons, butterflies with kaleidoscopic wings, towers that resemble dazzling swirls of DNA, or whatever you can imagine! For live demonstrations of probability, physics, and art, you can either follow the step-by-step directions or experiment with your own original creations. Challenge your child's spatial skills with hours of continuous play! And don’t worry, the Spectrum Set is just one of five Q-BA-MAZE 2.0 building sets. Made with MindWare’s attention to quality and care, our well-crafted and durable pieces leave you with a new experience every time. The cubes are made from phthalate-free and BPA-free ABS plastic for safety. Please note: This product includes a CHOKING HAZARD and is NOT for children under 3 years of age. Package includes (1) Q-BA-MAZE 2.0 Spectrum Color Set with 30 bottom-exit cubes, 60 single-exit cubes, 30 double-exit cubes, 30 marbles, and 1 instruction booklet. For ages 6 and Up.