Learning Resources Uppercase & Lowercase Alphabet Puzzle Cards. Build new preschool readiness skills, one piece at a time. Get your little ones learning and playing at the same time with the Alphabet Puzzle Cards from Learning Resources. This set of 26 colourful three-piece puzzles helps kids master early alphabet and language skills through brain-teasing puzzle play. Each puzzle features one letter of the alphabet in uppercase and lowercase form, as well as a full-colour image of a vocabulary word that begins with that letter; from alligator to zebra, your kids will pick up new language skills as they play. Designed with little ones in mind, each puzzle is self-correcting, which makes it easier for kids to puzzle out the one right answer. Each set of Alphabet Puzzle Cards comes in a sturdy reusable box that doubles as a storage container when playtime is done. Ages 4+.