Michael Ross did an interesting analysis of McDonald's Monopoly game and Tim Horton's "Roll Up the Rim to Win" (not living in Michigan anymore, I had kind of forgotten that Tim Horton's existed...)
http://regressing.deadspin.com/the-math-behind-mcdonalds-monopoly-1642081131
http://www.mikerobe007.ca/2013/02/the-economics-of-roll-up-rim-to-win.html
I like the data displays he uses in his Monopoly analysis are nice (2-way table vs. pie chart), and I like the comparisons used in his analysis.
Not sure exactly what math I would have kids do with this, but it's fun. Maybe it would give kids another mathematical reason to not eat at McDonald's.
