Our brightly-colored Rainbow Magnets are perfect for small hands. A great teaching aid to help students discover that opposite poles attract and like poles repel. These durable, pinch-resistant magnets are enclosed in plastic for easy clean up. Students can conduct an investigation to compare the different strengths or directions of pushes and pulls on the motion of an object. How will the magnets interact? Can you make them 'flip'? Countless explorations for young scientists! Button magnets are 3 cm diameter x 1 cm thick (1.2 x 0.4 inches). Not suitable for children under 3.