The slanted wooden box contains 27 English alphabet sand boards: (lowercase handwritten English letters) vowels (a, u, o, i, e) half-vowel letters (y) printed on the blue base plate, and y, b, p, m, f, d, t, n, l, g, h, k, j, q, z, x, c, s, r, v, w) are printed on the pink substrate,