and anyone know how much it costs?

Im thinking it would make a wonderful long time souvenir for the girls, have each choose their pearl and have placed in a locket or whatever in a necklace

Has anyone done this?

How does it work?

Any pics?

Last trip I saw from afar, Natalia was taking a nap in her stroller, and they made a big deal about it and lots of noise, so I didnt get close for fear of waking her up...