Motivation is a major problem for most people who have undertaken any sort of exercise program. Many people join a gym or start a program - especially after New Year's - and then quickly get bored or frustrated and drop out. Fitness studio BRICK New York has come up with a clever plan to keep its members motivated: 3D printed Russian nesting dolls that get thinner and thinner as the member works through each stage of his or her fitness plan. Check out more at 3DPrint.com: http://3dprint.com/120584/3d-printed-fit-nesting-dolls/