Because last year's edible rendition of the plagues wasn't bad enough.
This year's Vacation Bible School featured a story about a leper (I'm not sure which leper story, but that doesn't matter). In keeping with VBS tradition, the snacks are an edible craft that represents the story du jour.
On the day they learned about the leper, the kids had cookies with icing for their snack. Each child got two cookies. One cookie just had icing. The other cookie had icing and sprinkles.
Guess what the sprinkles were supposed to represent?
Little Brother may never look at sprinkles the same way again.