Af due Christmas

Well my period is due on Christmas day, so I've decided I will take a test that day (if I don't get af.) I'm just thinking in advance that on the off chance I do get a positive it'd be awesome to tell my SO as a cool Christmas 'present'. So I guess my question is: do any of you have any cool ideas for a Christmas bfp? Any ideas are welcome! I also have a three year old son if that helps with any ideas.

I would prefer to tell JUST my SO at first so its something we can enjoy together for a bit befor telling our families. Thanks everyone!