Generic Light Up Newtons Cradle Balance Balls Science Psychology Puzzle Desk Fun Gadget Kinetic Energy Science Toys Home Decor (Black)  (Multicolor)

Light Up Newtons Cradle Balance Balls Science Psychology Puzzle Desk Fun Gadget Kinetic Energy Science Toys Home Decor (Black) A futuristic take on this classic desk accessory. | Bright, multicolor LEDs in each sphere. | See the laws of conservation of mass and energy expressed in color! | Experiment with releasing multiple balls at once and observe the effect. Authentic Fun Central Branded, absolutely awesome Cradle Balance Balls. | The Newton's Cradle makes a fun conversation piece, and fits perfectly on a desktop or coffee table. ?Specification:Quantity:1pcs.Product Material: frosted glass + fishing line + plastic baseNot only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and EnergyFriction and damping effects are also observedIncludes steel balls, plastic frames and baseSize:12 12 9cm.Easy and convenient to use.Batteries: 4 x AA batteries(Not Included)Glowing Newton ball swing more dazzling at night, the base has a luminous plate, projected onto the glass beads, glass beads showing colorful, very attractive.?Package:1 x Newtons Cradle LED Light Up Kinetic Energy Home Office Science Toys Home Decor?About Us:? If you have any question, please contact with us for the first time. We will reply as quickly as we can.? If you are satisfied with our service and product, please show your objective evaluation. Wish you have a good shopping experience in here