Magnetic Marbles (100Pk) offers a thoughtfully designed, durable resource for hands-on learning. These plastic cased marbles look like colourful_x000D_ plastic balls, but each one contains a magnet_x000D_ so they stick together, hang together and pull_x000D_ towards and away from each other - as a first_x000D_ introduction to the magical world of magnetism_x000D_ they are great fun. _x000D_ Pack of 100. Dia 1.5 cm. Rec. 3+._x000D_ Supervision recommended.