This set includes 4 colourful boxes of green, red, blue, yellow and matching discs for sorting and colour recognition. The discs are coloured on one side and chalkboard on the other, offering endless learning possibilities. Kids can practice counting, early literacy, math skills, or simply have fun drawing with chalk. Use the boxes as letterboxes for notes and surprises! Each cube is 4.7" x 4.7" (12cm x 12cm) and the discs are 1.8" (4.5cm) diameter.