They liven up any dull afternoon!
Interactive breast bounce-ometer. The FF/G-cup-on-horseback simulation is particularly mesmerizing. (Dan showed me this.)
"Knockers up gal" Rusty Warren and her MP3 clip of "Bounce Your Boobies." (Lynell told me about her.)
Bust Doctor vibrating bra: "Spray special healthful liguid on bust. After put on bust doctor, plug in and trun on switch button." (Lynell sent me this link too.)
And the funniest calculator trick in the whole wide world:
(Demonstrated by a second-grade classmate whose name I have long since forgotten.)