Treasures From Jennifer Lower Case Alphabet Puzzle. A beautiful, heirloom alphabet puzzle. The letters will be blocks for the youngest children, a shape to stack and build with. As the child’s curiosity increases, they’ll learn to identify the letters by their names and sounds, placing them in correct order on the base. You can also sort vowels and consonants and practice spelling and reading. Use in play dough as stamps. Fill the base with dry beans or wool balls. So much more than just a puzzle.