Phonics Tri-blocks TubMakes phonics learning fun and hands on. Guides students through a systematic phonics progression. Teaches short vowels and long vowels. Teaches adjacent consonants and blends. Supports split digraphs and multisyllabic words. Helps students add suffixes and adjust spellings. Uses color coded blocks to show spelling rules visually. Allows blocks to turn to change middle vowel sounds (CVC, CVVC). Lets students swap blends (for example, "sp" to "sl").