4 yrs. & up. Use the 1-1/4" alphabet letters for completing one, two, or three blanks on the corresponding word cards. Kids get plenty of hands-on practice building words as they learn to identify word patterns, recognize letter-sound relationships, and increase their vocabulary. Each kit is designed in a format for kids to have fun while also obtaining important hands-on practice. The set includes 6 word-building categories: beginning sounds, blends and digraphs, ending sounds, word families, vowel sounds and double vowels.