Physical Science experiments DIY electric Wind Car Child kids student Technology

Physical Science experiments DIY electric Wind Car Child kids students Technology 100% Brand New & High Quality feature:1.Happy and easy to learn2.Exercise your children practical ability3.Train your children observation capability,thinking and analytical skillsNote:Because the battry does not allowed send by normal post,we will send without the batteries,you should buy it by yourself,please unstand about it,thank you!Since this series of products are handmade, it is not out of the industrial and mechanical products, compared the dimensional accuracy. Require high dimensional accuracy for buyers, please carefully buy it!The item is bulk when you received it,you should assemble by yourself! Aerodynamic car is a kind of wind-powered green locomotives. When the power is turned on, the motor drives the high-speed rotation of the propeller, generating wind blowing back, the reaction in the air, they push the locomotive moving forward. Change the size of the motor speed and wind wheel, you can also change the locomotive speed. Tips: Technology small production have a certain degree of difficulty, because we seek is made in trial and error, and understand how it works in the production process. Because each person's stock of knowledge and ability, there is no guarantee that everyone can create a successful, if not understand the local please contact customer service. We launched all products are carefully designed and a number of successful experiments. If production is not successful, belong to the production technology and methods are not in place, you can contact us to give technical guidance. This set of science and technology small production mainly for schoolchildren, ages smaller please make adult assisted. Warning: Technology small production model of the product manufacturing process which are required under the direction and control of adult children to safe operation. Otherwise, the factory adverse consequences resulting therefrom shall be excluded. If any damage during shipping when you receive the package, please feel free to contact us and better to send us the photo of damaged item, so we can check what happened and make the best solution for you. Shipping Information 1. We only ship to the confirmed address provided by PayPal. Before you pay, please make sure your address in PayPal matches the address you would like us to ship to.2. Import duties, taxes and charges are NOT included in the item price or shipping charges. These charges are the buyer's responsibility.3. The items will be ship out soon when received a verified payment (Max. 3 business days).4. This item is usually shipped from US warehouse or Asia warehouse.5. Ship worldwide, usually need 30–50 business days (to the US about 12-24business days).6. We try our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the local custom and post service. If you do not receive your item on time, please contact us immediately for further assistant. We will responsible for any damage or losses incurred in the shipping process. Return & Refund Policy 1. If you are not satisfied with the item for any reason, please contact us within 5 BUSINESS DAYS after receiving the item.So we can arrange something for you such as a refund or exchange, subject to availability, after we receive the item back in good and unused condition.2. Return shipping cost is your responsibility. We reserve the right to 'NOT refund' if you leave a negative feedback BEFORE contacting us.3. If you are satisfied with our products and services, please leave your good comment in detail rating of your order. Your recognition will make us more confident to develop business and serve you better.Customers' satisfaction is the most important thing for us. Any problems could be solved through communication. Thanks For Taking Your Time and Have A Great Day!