BumpyBooks Flash Cards-Series 2 is the next in the Bumpybook learn-to-read series. In this pack of 31 cards, we teach you how to teach combination sounds, such as digraphs (ch,sh, etc.) , blends (br, cr, etc.) and tied-together sounds (ing, ung, etc.). Create tactile cards by laminating regular paper or printing on card stock. Follow easy instructions provided to make your cards "BUMPY". All BumpyBook products are based on the Orton-Gillingham building block, multi-sensory approach to teaching reading and language.