Many CADL locations have a place to write, and often storytimes include crafts involving drawing, writing, using scissors and other fine motor activities.
Here are some books about drawing and letters:
Harold and the Purple Crayon by Crockett Johnson
The Day the Crayons Quit by Drew Daywalt
Chicka Chicka Boom Boom by Bill Martin
Pete the Cat: I Love My White Shoes by Eric Litwin
Journey by Aaron Becker