Six winters ago, Minneapolis artist and art activist Peter Haakon Thompson teamed with David Pitman and other artist friends to construct ice houses and place them for a few freaky, frigid weeks on Medicine Lake, west of Minneapolis. The Art Shanty Projects has since become a January tradition — 20 teams of artists, designers and architects to turn their whimsy into three weeks of reality on the tundra. 3-Minute Egg poked around Saturday’s opening festivities, braving gthe Arctic winds so you don’t have to. Of course, if you care to, the Shanties remain up through February 14.