Taking place over Zoom, the eight-minute-long sessions give children the opportunity to see and chat with Santa.
Calls can also be upgraded for £5, which gives a USB with a recording of the call, as well as a small gift.
Money raised from the event will go towards Charlie House, which supports children and young people with complex disabilities and/or life-limiting conditions and their families.
Susan Crighton, director of fundraising at Charlie House, said: “We were devastated to learn that under the guidance issued by the Scottish Government this week, it is not possible to hold an indoor Santa experience in a Level 3 area.