My mom used to carry on a tradition from her mom, and I don't know where it goes from there - but she would hide money, her wedding ring, other random things in the pancakes - and based on what you found it was like a fortune to determine who you would marry, or what you were going to be when you grow up. Crazy choking hazard, but it was so fun as a little girl to find them. It probably comes from the charm cakes from Victorian days - I can't find any other information online about anyone else doing this.
Anyhow to amp up the fun factor in my house I just add chocolate chips. However over the weekend I had delish pancakes that were topped with sliced banana and toasted pecans... now that was yummy!