My 3 year old son and I absolutely love Word World. If you are unfamiliar with this series, its a PBS show geared at teaching phonetically, letters and simple reading and spelling. All of the animals and the objects in the world are actually made of the letters that spell the word. For example, the character dog, is made up of the letters D-O-G. A hat is actually H-A-T.
Each episode focuses on a different word or sound, while cleverly folded into an entertaining story. My son has already picked up a couple a letter sounds and the spelling of a couple of words including his favorite: C-A-K-E.
I purchased this Box Set because it came with 16 episodes, 8 for each disc and was a much better deal than some of the singular discs which only come with 4 episodes. The DVD menu has the option of playing all the episodes, selecting an episode or the special features, which will play just the "Build a Word" song from each episode. I would highly recommend this series to any parent(s) trying to encourage their child to take an interest in letters, words and early reading.