FREE!!! Wacky Tales Teach Parts of Speech http://www.eduplace.com/tales/
Summary: Houghton Mifflin (the education textbook publisher) sponsors this website that helps kids learn parts of speech - nouns, adverbs, adjectives, verbs, etc. Using interactive stories called "Wacky Web Tales" they offer an online version of the classic car game, Mad Libs.
Description: When you get to the site you'll see a menu of Wacky Web Tales titles. Click on any one and a new page opens that reveals the story title and a form. The form requires you to type in parts of speech (such as a singular noun, adjective, or present tense verb). The words you enter will be used to create a Wacky Web Tale -- simply click on the "See Your Wacky Web Tale" button at the bottom of the form.
If you are unsure what an adverb (or any other part of speech called for on the form) is - just click on the "Parts of Speech Help" button for some quick definitions.
Because you don't know how the parts of speech you filled in on the form will be used in the story - the resulting Wacky Web Tale can be pretty funny. This is a painless way to learn, reinforce, or remediate parts of speech.