3 years & up. Young children can practice letter formation with this fun, squishy Playfoam set. The no-mess, non-stick Playfoam is ideal for crafting squishy, squashy creations anytime and anywhere. Since Playfoam never dries out, the creativity continues without end. The set includes 8 colorful Playfoam bricks and 13 double-sided alphabet sculpt-me letter cards. Preschoolers can simply place the Playfoam on top of the letter cards to practice forming letters correctly.