While we're still on the subject of fun experiments you can do at home, an excellent book for any of you with children is Nathan Shalit's "Cup and Saucer Chemistry," which may still be available from Dover Books. Shalit walks you through a good number of chemistry experiments that can be performed using--harmless--items found around the kitchen.

(and thanks, Sparts)

(As to wintergreen lifesavers, I have it on the authority of The Straight Dope (Sparts duly thanked above) that "triboluminescence" is the correct term.)