There are many fun and educational ways to teach children their ABC's. 

First, there are wooden ABC puzzles.  These wooden puzzles are great for infants and toddlers because they are very durable.  Some puzzles have knobs or pegs so that they can be easily gripped by a young child.  ABC puzzles also come in matching style puzzles where your child can match a picture to a letter (i.e. a picture of a fish to the letter "F").

You can also teach children their ABC's by using card games like Alphabet Bingo, Find the Letter, Word Families, and Lipsync.

Wooden Toy Blocks, Musical CD's, and Educational Carpets can also be great resources to teach the ABC's.

Finally, children will love to learn their ABC's if you would read them their favorite alphabet book.