Features- Material: durable hard plywood and solar panel.- Assembled size: about 27*15*8cm.- It is a cool and funny 3D Wooden Sea Knight Twin-engine Aero transport Aircraft Woodcraft Toy， allowing you to DIY manually assemble it without glue water and screw.- The included veneers are carved delicately for easy to use.- With the included solar panel and engine， the propeller can rotate in the sun after being assembled. (Note: the helicopter can not fly.).- Can help to stimulate kids' imagination， observation and manipulative ability， understand the relationship between /a part/ and /a whole/， cultivate patience and logical ability， learn the knowledge and application of solar energy， so as to enrich the child's extracurricular activities， and achieve the effect of teaching and playing.Package Including3 * Veneers2 * Engines1 * Solar Panel1 * Sand Paper 1 * User Manual