These double sided chunky magnetic pieces help children to visualise what can be a hard to understand concept enabling them to grasp a real understanding of fractions percentages and decimals the reversible pieces show equivalents eg 15th is equal to 20 and also to 02 and you can line the pieces up on the magnetic grid or fill in sections of a shape or units and use the pieces to find the right answersa dry wipe pen is also includedbuilds mathematical understandingdimensions 18 x 25 c