As you know, alliteration is the stuff that tongue-twisters are made of. According to dictionary.com, it's "the commencement of two or more stressed syllables of a word group either with the same consonant sound or sound group (consonantal alliteration), as in from stem to stern."
You will need 1 regular die and 1 20-sided die from a Scattergories game. You are ready to teach alliteration. Roll 'em. If you get a 1 on the regular die, or a vowel on the Scattergories die, roll again.
The object of this games is to create alliterative headlines. Say you roll a 3 and a T. Your headline could be Thumbelina Throttles Thor. Grrrrr. This is a fun way to spend a few extra minutes of class, or introduce alliteration to your masses. You may choose to award the most ridiculous headlines; writers generally want to share their creations when it comes to this game.
Keep your eye out for Scattergories when you visit thrift stores. There's also a good chance that you have a friend with a dusty edition of that game who would be happy to set it free from storage.