Williams developed the product because he and his then-pregnant wife wanted it for their own baby. Since a baby’s hearing is fully developed at just 20 weeks in utero and his memory begins to form at 30 weeks, they were looking for a way to bond—and be sure their baby heard them. With Bellybuds, they could transmit music and sounds, and speak directly to their unborn baby. The buds—think of them as attachable earpieces made for the belly—adhere with a reusable gel ring, and allow Mom and Baby to listen to music together, as well.