Here’s a selection of crowd-pleasing elevator pitches from years past.

Pregeasy

Sagar Pilania 12 and Sumit Suman 11 earned a 2011 Audience Favorite award for a device placed inside a toilet that tells the user via text message when she ovulates so that she can increase her odds of getting pregnant.

Catistan

David McCreery 10 earned the Most Outrageous Elevator Pitch award in 2009 for this social network that is similar to Facebook — except for cats. The site would be supported by the sale of merchandise that cat owners can emblazon with their feline’s image.

Turn Off

Adam Birnbaum 08, Nir Bruner, and Sonja Kosman 08 earned the Most Outrageous Video award in 2008 for their idea for a drug designed to temporarily stop sexual arousal by halting the production of pheromones.