Magnetic Coloured Marbles - 21ENC00025 offers a thoughtfully designed, durable resource for hands-on learning. Magnetic Coloured Marbles _x000D_ These plastic-cased marbles look like colourful plastic balls, but each one contains a magnet so they stick together, hang together and pull towards and away from each other - as a first introduction to the magical world of magnetism they are great fun. 2 of each in 10 colours.