These magnetic blocks are ideal for teaching addition subtraction division multiplication and number sequencing.All of the blocks are colour coded to show even numbers (blue) odd numbers (yellow) and operations (red).This set contains 16 numbers (numbers 0-10 plus extra blocks for 1-5) and 5 operations (1 each of addition subtraction multiplication division and equals). Printed on one side so you can hide answers and part of number sentences.The magnetic blocks easily connect together.Develops fine motor and numeracy skills.Each block measures 3 x 3.5 x 3.5cm.