To teach kids ages 6 and up and easy build-it-yourself chopper powered by the sun Learn about solar energy and solar panels. Build your own army helicopter and have fun with the spinning and patrolling all powered by a solar panel The Greenex Series is 100 battery-free eco learning fun that connects the environment to amazing science experiments. Smartly designed each Greenex kit allows kids to snap the pieces together with ease. Simply snap all key components and modules together to start and then pull apart once finished. This encourages kids to experiment on their own for additional learning. Best of all each kit can snap to another to integrate functions and double triple quadruple the fun.
My Opinion: I found this a great learning tool and fun and easy to assemble. This is a an affordable priced and being eco-friendly is a plus to save money on batteries or and electricity.
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Disclaimer: I was in no way compensated for this review and this is solely my own opinion which may differ from yours.