Q-BA-MAZE is a unique system of colorful cubes that interlock to form an exciting marble run. The big difference? The configurations are UNLIMITED! Build shapes like flowers, fish or dinosaurs! Challenge your child's spatial skills with hours of continuous play. All Q-BA-MAZE kits are compatible. This kit includes The fun-sized Q-BA-MAZE Big Box set, featuring 72 cubes with 3 types of exits and 20 steel marbles! It’s a variety set great for hours of entertainment, without too many parts to overwhelm younger builders.