Lacing alphabets teach children eye hand coordination which is one of the most basic skills needed to master as a youngster. Ready2Learn Lacing Letters support visual discrimination, visual closure, concentration, letter recognition, sorting, and will also teach colors. The vowels are yellow and the colors of the remainder of the letters are red, blue, and green. Includes 52 letters (26 uppercase and 26 lowercase) and 16 laces. – Please use only with adult supervision