29 Replacement Letters and Numbers for the VTech Count & Learn Alphabet Bus. *** Set includes all of the letters of the English Alphabet, except for the letters: A, X, Y, & Z (They are missing) Also includes the numbers 4-10. Compatible with the Alphabet Bus platform, NOT MAGNETIC, allowing your child to learn and practice their ABCs and 123s in a fun and engaging way. New in Original Packages. Thanks for Shopping!