... Sand pendulum is a relaxing decoration.2. Color: Red, Blue, Yellow, Pink, Orange, Purple, White, Green, Turquoise, Black3. Size: a lot ... of kinds, also can design as your requirements.4. Packing: gift box. Sand pendulum:1) Secured in ... kinetic energy into potential energy. 2) The extremely fine sand (included) provides minimal friction allowing the pendulum to swing ...