Description:<br />This classic desktop toy provides you many benefits and entertainments. It is suitable for various locations such as house and office. It is an intriguing device that not only demonstrates pendulum motion? but also helps to show the laws of Conservation of Momentum and Energy. Whether you are studying physics knowledge? working on complex analysis? or looking for a delicate gift? this toy is definitely what you really want. <br /><br />Main Features:<br />- An exquisite decoration that can be placed in house? school and office <br />- Educational purpose: Swing one metal ball back? let it go? and watch as kinetic energy causes the one on the opposite side to swing the same distance<br />- Psychological purpose: If you're feeling saucy one day? you can try swinging two or three at once - just releasing your stress with it<br /><br />Note: Friction and damping effect are inevitable<br /><br />    Specifications<br />Basic Information<br />	 Type: Intelligence toys                                                  <br />                        Age: 6 Years+                                                  <br />                        Material: Plastic? Metal                                                	<br />Characteristic<br />	 Design Style: Geometric Shape                                                  <br />                        Features: Educational                                                  <br />                        Puzzle Style: Common                                                  <br />                        Small Parts : Yes                                                  <br />                        Washing : No                                                  <br />                        Applicable gender: Unisex                                                	<br />Dimension and Weight<br />	 Product Weight   : 0.157 kg                                                  <br />                        Package Weight   : 0.280 kg                                                  <br />                        Product Size (L x W x H)   : 18.2 x 6 x 14.5 cm / 7.15 x 2.36 x 5.70 inches                                                  <br />                        Package Size (L x W x H)  : 22 x 7 x 15 cm / 8.65 x 2.75 x 5.90 inches                                                	<br />Package Contents<br />	 Package Contents: 1 x Balancing Ball Toy                                                	<br /><br /><br /><br />                                            <br />                       Product Safety Disclaimer: <br />We do not accept any responsibility or liability for misuse of this or any other product.  All our products are extensively tested to comply with rigorous and strict QC standards.  For certain products (e.g. toys? knives? etc.)? we recommend proper supervision as we cannot be held liable for misuse or accidents.<br /><br />  Disclaimer: <br />We do not accept any responsibility or liability for the incorrect purchase of our products.  All of the products on the website are extensively tested to comply with rigorous and strict QC standards.  For all of our clothing products? items and accessories? please take careful note of the precise measurements? mainly shown in centimeters (CM).  As part of our company policy? we will not be able to accept returns or provide refunds for items which are the wrong size.<br /><br />                                                <br />