"Following the birth of his [New York designer Russell Greenberg] first child in September, he... created custom baby rattles with ends shaped like profiles of mom and dad.
The maple-wood toy is carved on a lathe, using profile photos of the parents as a guide, and finished by hand in Long Island City, New York."
Greenberg also used the same idea for his wedding rings.
"When the New York designer Russell Greenberg married in 2008, he designed his own wedding ring, based on the profile of his wife’s face"
[via]