Here are some workpages for kindergarteners or very young beginners. I use these as supplemental activities after my students have studied Aa-Zz.
The first three files lend themselves well to reviewing the colour-coded letter groupings as divided in the Let's Go Starter book (aeiou/ bcdgtv / flmnsx, etc), but they don't have to be used that way. Other suggestions might be to have kids colour and then cut out the letters for their names, or simply as a colouring activity to see which letters they can identify.
The files ares:
1. ABCD - uppercase only
2. abcde - lowercase only spaced to match the ABC song
3. abcmatch - an upper and lower case matching exercise
4. alphabet_chart - boxes with space to draw in a word with a matching beginning sound