Solar Powered 3d DIY Jigsaw Wood Winnower Kits Windmill Puzzle For Child Educational & Home School Lesson Kit , Alpinia oxyphylla DIY wooden 3D puzzle. Green material to ensure safety. Knowledge of structure mechanics and solar energy Solar Powered Motor, it will rotate automatically under the sunlight Easy assemble. No glue required, No battery required. Easy to assemble by following step by step instruction Fun, educational, simple model. A fun demonstration of solar energy .Outstanding Home School Lesson Kit - Imagination, Education, DIY Accomplishment Fun Solar cells and motors included. Suitable for 6 years and upwards. WARNING : CHOKING HAZARD - small parts. Not for Children under 3 years