EWA Eco Wood Art 3D Wooden Puzzle Mechanical Model for Adults and Teens Kinetic Globe DIY Kit Self-Assembly No Glue Required

MECHANICAL MODEL: The model consists of inner and outer rotating balls. The wind-up rubber-band engine inside the model makes the ball move round the axis in the opposite directions. FUN FOR ADULTS & TEENAGERS: Adults teens and older kids love the challenge of model building and kids can learn about gravity gears design and engineering concepts as they build! Manufactured by EWA Eco-Wood-Art. EDUCATIONAL TOY: Enhance your creativity logical reasoning and problem-solving skills with this relaxing hobby during your spare time. Parental assistance for kids under 14 recommended. INDOOR ENTERTAINMENT: The complexity of this set brings people together and provides hours of amusement for everyone. A great family activity this puzzle is engaging fun and exercises your mind! 3D LASER CUT WOOD PUZZLES: Made from Eco-Friendly birch plywood this mechanical model is a puzzle you build by fitting laser cut pieces together with no messy glues or adhesives required.