IMO the cinnamon rolls would be more kid-friendly than actual King Cake anyway.
How many kids do you have to make it serve?
The jumbo rolls are 5 to a can; IDK how many you get with the smaller ones.
I'm thinking half-sheet pan or jelly-roll pan, lay down some parchment & stick the rolls next to each other ... I guesstimate that you'd probably need 3-4 cans of jumbo rolls to make up the surface area.
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Liz
DD (3/2010)
"Make mistakes! Get messy!" - Miss Frizzle