Breathing underwater, like eating fireworks, constructing a monument, and getting married, should only be attempted if you're confident you can do it. Foster self-assurance and condition lungs with today's Groupon: for $10, you get a Discover Scuba class at At The Water's Edge (a $25 value) in Westfield.

At The Water's Edge's dive masters shepherd flocks of neophyte Nemos through a three-hour discover scuba class, teaching divers the ropes of safety techniques, equipment usage, and actual ropes. After on-land instruction, scuba students reconvene in the on-site pool for more than two hours of educational submersion. Designed with beginners in mind, the classes accommodate Groupon holders looking to stretch their gills to prep for hydrovacations or win back true loves from the arms of an amorous octopus.

This scuba class requires that participants be reasonably fit, in good health, and able to swim.