Smellevision!

STANFORD, Calif. -- Business students, startups, and campus researchers showed off their latest innovations yesterday at the Cool Product Expo at Stanford University. The R&D project topics ran the gamut, from transportation to medical devices. But most shared one thing in common: coolness.

Take, for example, Scent Sciences, which is adding another sense to your digital entertainment: smell.

Soon, your games, movies, Internet and TV might really start to stink. It's creators say that eventually, these little smell generators will be in cell phones, too. Instead of a custom ringtone, you might assign a smell to someone's call.

And in the not too distant future, the technology will be made into wireless clips for movie theaters. Go to the movies, and receive your 3D glasses along with your scent clip that will dispense the smells of the film.

Click on for more of the big ideas coming out of the Stanford Cool Product Expo.