elp Children Learn and Count Numbers 0 to 20 with Colorful, Engaging Flashcards ! Brought to you by Teacher Created Materials, supporting learning in and out of the classroom for over 45 years! These Counting Flash Cards are a fun way for preschoolers, kindergarteners, and early learners to memorize, practice, and review numbers 0 through 20, forming a foundation for future math education. Designed for various learning, practice, and play scenarios, finding reasons to use these whimsically illustrated cards is as easy as 1, 2, 3!