This episode on the letter W features footage of WILD HORSES. It provides a list of other words beginning with W (web, worm, water, winter) and invites children to add their own. This episode on the letter X explains that this letter rarely begins a word, and usually comes in the middle or at the end of a word. It features wildlife footage of the LEMUR, an eXotic animal.. It lists other words with X in them (box, six, exit, excitement) and invites children to add their own.