Recently seen two projects on Kickstarter which are kind of a watch (however, it does not display time) that triggers hot and cold sensations to your body to relax, like if you are at hot place or feeling hot then you can click cold button and the watch feels like a ice pack in your wrist and you will feel better and the same way if you are feeling too cold then you can press hot button. You can also vary how much hot or cold watch should get.
