Learning the ABCs should be a fun process for kids, and the Mudpuppy Animal ABCs Flash Cards are a great product to learn with. Each of the two-sided flash cards features illustrations, with one side offering an animal illustration with the letter. The 26 cards fit on a plastic ring that you can remove if the children want to sort the cards. Mudpuppy teamed with Barefoot Books and Clare Beaton to create the fun illustrations. The cards, aimed at children ages 3 to 7, each measure 5 by 2.25-inches.