An extremely flexible resource to help develop Numeracy Skills. A familiar idea, helping to show how 2 separate or different items can be brought together to produce in the overlaping area a 'combined result' e.g. S and H are combined to give 'SH'. All are compatible with dry wipe markers and soluble OHP pens. Size: H-250mm W-250mm. ALSO AVAILABLE: other designs, and clear OHP's. Sold in various sized packs and individually.