Using this Newton's Cradle is super easy. Just pick up one of the balls at either end and let it go. Watch as the energy transfers through the balls, making the one on the other side swing up. It's a fun way to see science in action. When it comes to safety, keep it out of reach of kids younger than 8 as small parts can be a choking hazard. To maintain it, wipe the balls and frame gently with a dry cloth every now and then to keep it looking shiny. Avoid getting it wet, as it could damage the stainless - steel frame.