Smartstones liberate people with a sense of presence. You simply touch it to let them "feel" that you're thinking of them, and can be notified if something urgent happens.
Smartstones are sensorial communication devices that connect with each other and enable small groups such as families, friends, or teams to sense each others presence as well as communicate - only without the need for a screen. They touch it, and you feel it, with haptic and audio feedback.
http://smartstones.co/signup