We’ve had them done at DL but assume it’s a pretty similar process at the MK.
For those concerned about squirming kids, take a profile photo at home when you catch them sitting still. They can work from a photo. I brought a photo of my boys when they were little and love that they could turn the hands of time back for me. I also had them do one once of my daughter when she was little. Very cool to watch them work. The lady we see at DL has been doing it for 43 years. It’s a treat just talking with her.