110-Piece Marble Run Set – Glow-in-the-Dark STEM Maze, Ages 3+

Build it, drop a marble, and watch gravity do its thing — then rebuild it taller. Endless STEM play in one set.

Key Features

• 110 pieces to build countless track layouts
• 10 glow-in-the-dark marbles for play after dark
• 20 bonus glass marbles included
• Teaches cause-and-effect, planning and problem-solving
• Compatible, easy-connect building blocks