Description Gangsta Goat . Gaz is a goat, but he wants to be a gangsta goat. It turns out being a gangsta goat is not easy. The Big Moo . A fox tells Pam that the moon is made of food. If she makes a loud moo, it will fall from the sky. The phonemes /oa/oo/ow/ are featured in this title. In Level 3 - Yellow 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').