The 4m green science windmill generator is a hand-on learning experience that teaches the value of renewable energy. The windmill generator uses green science to harness wind power and light an led bulb. This kit contains all the materials needed to build a 5-inch windmill generator with led light. Just add a recycled soda bottle. An enclosed pamphlet contains fun facts about renewable energy. Detailed assembly instructions included. Recommended for ages 8 years and up. The windmill generator uses green science to harness wind power and light an led bulb. This kit contains all the materials needed to build a 5-inch windmill generator with led light. Just add a recycled soda bottle. An enclosed pamphlet contains fun facts about renewable energy. 4m educational toys cover a wide range of educational subjects and include science kits, arts and crafts kits, robotics kits, and more. Recommended for ages 8 and up.  # Pieces In Set: 18 Recommended Ages: 5 Years And Up Measurements: 6.75 Length/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.