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. This set contains 1 back board (19.5 cm x 28cm)with 280 holes, 1 threading pen and 6 coloured laces. 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 2 single pattern boards attached together.