Sunnytech Weight-Lifting Stainless Physics Balancing Tumbler Toy Solar Power Windmill Black Propeller WJ161-WJ154

Features:Model: WJ161Principle: Not only demonstrates of balance, but also shows the Laws of Conservation of Momentum and Energy Size: Height 21cm * width 19cm/ 8.26in * 7.48in Material: metal---- please measure the size with ruler instead of image the size in mind Features:Model: WJ154 Size: check the gallery picture Material: Metal+ + Solar panel Product Net weight: 65g / 0.40 lb

• WELL-MADE---- Most of material is silver stainsteel. Chromium plating process, the functional mainly reflects in wear-resisting, has a smooth surface, will not rusty and fade. Ingenious designs and unique style, let you own your attractive desk decoration. Size: Height 21 cm * width 19 cm/ 8.26 in * 7.48 in . Please measure the size with ruler instead of image the size in mind.
• BALANCED---- It's balanced on the weightlifter one leg, which makes you feel really incredible, you can give the weightlifter a gentle push to make it work, slow down the speed when time passed and finally stop. You don't have to worry about it falling off, it can be well keeping balance. Push the weightlifter lightly, it will rotate 360° around the center stand balance. The toy continues in perpetual motion for ONLY 2-3 minutes due to the resistance of the air and friction.
• SOLAR POWER---- The solar windmill blades run madly if you put the windmill under directly sunlight. It can't work in Interior lamp, like flashlight and cell phone flashlight. Don't expect wind during running, it’s not a fan.
• GOOD FOR TAKING A BREAK----This is something that gives your eyes a place to focus when you need to clear your mind. If you have a fan running it stays in motion. It's built sturdily. I can imagine your colleagues pausing from work and chilling out for a bit watching this.
• PRIORITY GIFT OPTION FOR MANY APPLICATIONS----It is an amazing and fantastic product at this price. It has a wide range of application as, great gift for Kids' science project, Physical/mechanical learning, teacher’s Demo props on the class, birthday gift for friends, families, parents, kids, etc. Many of our customers come from school, colleague, etc.