Desk decor: Desk decor newton's cradle pendulum and desk toys for office decoration to make it look attractive and organized. You can put it on your desk or shelf, and swing it anytime when you passing by, it will be a wonderful scenery in your home or office!Good gift idea: Suit for both kids and adults, excellent for learning science, killing boring time, which makes it a good present for birthday, holiday.Scientific design:Pendulum demonstrates the laws of conservation of momentum and energy with its scientifically designed perfect ball alignment and swing time of over 40 seconds.Occasions: This can be used as office decoration, teaching aids and fun family activities, such as science education supplies, leisure and entertainment, birthday gifts, holiday gifts, business gifts, etc.Gravity in action: Witness the mesmerizing transfer of energy and weight as the newton balls fall and rise, showcasing the principles of gravity. Whether you release one or two balls, the astonishing energy transfer unfolds right before your eyes, offering a remarkable display of gravitational principles.