ROKR Cog Coaster Magic Crash LG502 3D Wooden Puzzle Marble Run Kit

ROKR Cog Coaster Magic Crash (Model LG502) — a fascinating 3D wooden puzzle marble run that combines gears, ramps, and mechanical motion into one mesmerizing design.   This STEM-inspired DIY kit features 236 precision-cut wood pieces that fit together without glue, forming a functional marble coaster that demonstrates basic principles of physics and engineering. Once assembled, turn the hand crank and watch steel balls roll through the intricate track system powered by gears and levers.   Perfect for collectors, hobbyists, or anyone who enjoys hands-on model building. Makes a great gift for teens and adults ages 14+ or a display piece for your office or workshop.   • Brand: ROKR by Robotime  • Model: LG502 – Cog Coaster / Magic Crash  • Material: Laser-cut plywood  • Pieces: 236 pcs  • Recommended Age: 14+  • Assembly Time: ~4–6 hours  • Difficulty: ★★★★☆  • Assembled Size: 254 × 232 × 166 mm  • Includes:  • 5 pre-cut wood sheets  • Steel balls  • Handle & shaft sleeve  • Sandpaper  • Wood glue  • Wax and spare parts  • Illustrated manual  • Packaging: New in sealed box   ROKR mechanical models are admired worldwide for their precision engineering and collectible quality. The LG502 Cog Coaster is a discontinued early design, making it especially appealing for enthusiasts who appreciate mechanical artistry and kinetic puzzles.   #ROKR #WoodenPuzzle #MarbleRun #3DPuzzle #MechanicalModel #STEMToy #Robotime #LG502 #CogCoaster #DIYKit #GiftIdea #CollectorModel