These durable two-colour counters and specially designed tray will help children develop an early understanding of sorting, counting, number bonds to 10, addition and subtraction in a highly visual and tactile way. Set includes: 10 frame tray made from sustainably sourced natural beech wood, dimensions: 380 x 155 x 20mm and 20 double sided stones made from a unique stone mix, dimensions: 45mm in diameter and 10mm at the thickest point.