Highlights: Creative DIY Educational Toy Mini Theo Jansen Model Science Series Assemble Gift It walks on the wind、 by hand or by blowing against the propeller No external power is needed Learn from joy Specifications: Item Type: Educational Toy Material: Plastic Single Size: 280*210*55mm Gross Weight: App. 420g The Mini Strandbeest was invented by Theo Jansen、Holland.He took 16 years create this educational toy. It moves just by the wind and its own engineering genius. No electricity or batteries help power this beautiful creature and allows you to spend time exploring the design while you build it. It\'s an amazing creatures infused with the power of nature. Reference Video: Link:http://video.yayun2010.sina.com.cn/v/b/54913144-1747330623.html