For just $19.99, you get a LED faucet light that streams blue water normally, but turns red as soon as it hits 89 degrees. Gimmicky, sure, but at that price how could you say no?
I present you with this T-shirt which mounts an animated (but unplayable) game of Pong on the bony forefront of your chest, using some unspecified display tech and two AAA batteries.