including this, which alone should totally convince Twitter skeptics:

Corey Menscher, a graduate student at New York University, developed the Kickbee, an elastic band with vibration sensors that his pregnant wife wore to alert Twitter each time the baby kicked: “I kicked Mommy at 08:52 PM on Fri, Jan 2!” Mr. Menscher is now considering selling the product.
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Liz Cox Barrett is a writer at CJR.