Christmas themed excel problems for team members

Hello all. I'm a CI driver in my department and I thought of "fun CI December activity". We will help Mr. Claus get his work on track. I'm working on issues that team will need to solve. For now I have:

Mixed uo naughty and nice list. It has messy formating, tarcking is a mess, colums doesn't make sence. And their task will be to calculate how many presents Santa needs to prepare.

I also have an issue with funding and his spending habits.

And thats kind of it, that relates to excel usage. I would like to involve more of it. To lead them to over functionalities. That more experienced team members could naturally show to new joiners. But I'm stuck on ideas. What else could be easily solved in excel? Nothing too complicated but fun to solve.

I'm thinking maybe something with stock? What Santa is short on in presents. But it seems to similar to naughy/nice list issue. Maybe invoice from provider which formating is messy and before using information in it, they need to tidy it up?

I would really REALLY apreciate all your wisdom and ideas.