Secret Santa is a fun event. You exchange gifts, and receive them. Why not do it on Scratch?
How to do a Secret Santa n Scratch:
-Pick a Scratcher(s) and think of something they like
-Make a project (their gift) and decide when to show them (You can unshare your project or add a script with the date block)
-Send them a link or notify the Scratcher when you're ready to show them
(You don't have to be Christian to do this)