Introduce and reinforce common vocabulary with short-vowel sounds in 20 three- and four-letter words. Photo cues match written words, and unique puzzle shapes encourage trial and error learning which leads to mastery. Supports learning standards from early-childhood professional organizations as well as national and state guidelines.  40 big (3" x 3") and sturdy boardstock cards are packed in a reinforced cardboard storage box, for many years of use.