Endless Mystery is an innovative educational toy that combines puzzles and mazes. Traditional maze toys in the market lack openness and playability, causing children to lose interest quickly. To address this, we developed a scalable and modular maze toy with built-in magnets, allowing children to attach pieces to create 2D or 3D mazes with varying levels of difficulty. The ball can travel through the internal tunnels to adjacent pieces. With two different angle settings, various combinations are possible.