Raised arrows on each letter quickly let the child know if a letter formation is being drawn in the wrong direction. Starting with the dot, a rub over with the finger shows the right way. Each set contains one each of all 52 letters. Includes both Uppercase (2-1/2" tall) and Lowercase (1-1/2" tall) sets. Ages 4-7. Warning! Choking Hazard: - Small Parts. Not for children under 3 yrs.