Description: This motion toy is made of stainless steel material, anti-rusty, safe and smooth to touch. Great for home ornament, study or office desk table decor accessories, etc. Also good for birthday gift and kids toy. Features: Made of stainless steel material, anti-rusty, safe and smooth to touch.Put on the desk steadily, do not occupy the space. As an educational toy to improve your children's study about perpetual motions.When you put the small people on the plastic base and poke it, it will swing on both sides for a while.Excellent educational & science gadget, own your very own piece of scientific history and explore significant values of physics.Great for home ornament, study or office desk table decor accessories, etc. Also good for birthday gift and kids toy. Specification:  Condition: 100% brand new Material: Stainless steel and Plastic Color: Sliver Size: 18 x 11 cm / 7.09 x 4.33 inch(appr.) Package Included: 1 Set Motion Toy Note: 1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering. 2. Please understand that colors may exist chromatic aberration as the different placement of pictures. Features High Quality Stainless Steel Material:The balance ball toys are made of high quality stainless steel material, which is rustproof, safe and smooth to touch. We believe that our balance ball toys will make you feel that you get what you pay for. No Space Occupancy: Newton balance ball is firmly placed on the desktop without occupying space, when you put the little man on the plastic base and toggle it, it will swing to both sides for a while. Excellent Performance: The educational science kits as an educational toy can increase your child's interest in learning about perpetual motion machines. We believe our balance ball toys can meet your daily life and work needs. Excellent Educational and Scientific Gadget: The office desk ball toy is an excellent educational and scientific gadget with its own scientific history, exploring the important value of physics. Widely Used: The physics classic science fun balance ball toy is a great choice for home decorations, desktop decorations for study room or office, etc. Can also be used as birthday gifts and children's toys