This excellent teaching tool is a great way for children to learn to be accurate by lacing threads in different holes in the rubber board. The set contains 4 back boards (19.5 cm x 28cm each which each have 280 holes, 4 threading pens and 24 coloured laces. The boards can be linked and wall mounted if desired. The application has a great number of educational benefits. It will help children with colour recognition, manipulative skills, problem solving and allow them to understand the need and reward of accuracy in the task involved. A must for every classroom. Please note this image shows a set of 2 pattern boards.