Learning Resources Rainbow Sorting Crayons. Children can get hands-on with learning a rainbow of colours with these giant sorting crayons! Bumper set includes 48 coloured plastic pieces featuring a variety of shapes, objects and sizes. Challenge early learners to fill up each jumbo crayon with the correct coloured pieces as they practice colour recognition, sorting, patterning and basic vocabulary skills. Set includes 48 sorting pieces, eight crayons and a fun crayon storage box. Crayons measure 24cm H. Suitable for ages 3+.