Description When an upset Orla runs into the woods, she bumps into a strange wizard called Burt. She asks to be turned into a magical unicorn. Can Burt help her? The phonemes /or/ur/ow/ are featured in this title. In Level 4 - Blue books, children build on the letter-sound combinations learned in levels 1 and 2. They learn consonant digraphs (sounds made up of two letters together such as 'ch' or "ll") and long vowel sounds (such as 'igh' or 'ai').