Specifications Product Name Solar windmill single panel double panel Material WoodSuitable Age 6 Years Old Product Size About 9 11 10CMProduct Function The solar panel drives the motor windmill to rotate double panels are easier single panels are simpler Features Interesting science and education works exercise hands on and brain powered abilities show windmill rotation experiments many assembly parts high difficulty and strong challenges Installation Instruction click herePackage included 1x Wooden DIY Solar Windmill Assembled Small House Material Set