People in glass houses shouldn't throw stones, but they also shouldn't juggle stones, eat stones, or sign leases for structurally flawed homes. Gain a house-load of glassy knowledge with today's Groupon: for $50, you get an hour-long glass-blowing class for two people at Portland Glass Blowers (a $100 value).

At Portland Glass Blowers, glass-work greenhorns and veterans twist and mold hand-blown glass creations under the watchful eye of a 10-year veteran glass blower. During this private session, pairs of students convert goopy, orange-glowing glass into stemless wine glasses, jewelry or other smoothly blown creations. As students mold and manipulate their pieces, the in-house instructor provides constant feedback and insight, allowing amateur hands to harden at an accelerated rate, much like playing patty-cake with a newly cemented sidewalk.