This weird shell looking gadget is actually a clever exercise and was nominated for Best of CES 2014. You can even use it as a game controller so you exercise while you have fun. Simply hold it in your hands, (against your thighs, against your desk, between your knees, etc.) and just press it. free app will coaches you when to press more or less, when to hold and for how long. The exercises are based on isometrics, similar to some yoga and Pilates mechanics.