Build a moving marble run display with this DIY wooden Gear Ball Challenge featuring interactive mechanical tracks, moving gears and precision-cut wooden components.

Assemble the detailed model and watch the metal ball travel through the twisting obstacle course powered by hand-cranked mechanical action. Includes wooden parts, metal balls and assembly accessories. 653 pieces. Recommended for ages 14+.

Features:

• Interactive marble run design
• Moving gears and mechanical action
• Precision-cut wooden components
• 653 pieces
• 295x195x205mm assembled