Crayola Dry Erase Learning Flash Cards Colors This is for a set of dry erase flash cards by Crayola Subject: Colors Contains 32 dry erase educational flash cards measuring 4.6 inches x 6.6 inches each! Flash cards use visual images and activities that help reinforce learning in preschool aged children and older! After use, wipe clean and re-use! Fun, educational cards set containing 64 activities on 32 double-sided colorful cards!