I think the costume's appeal speaks for itself.
I would like to comment, though, on three problems of execution that I anticipate and have highlighted in the drawing.
1. Growing a mustache. It's the linchpin of the costume, and it's something that I can't do.
2. Girth. Will I fit through doorways? Hallways? Narrow corridors? Furthermore, cardboard cylinders are not the most flattering attire. I want to look trim; I don't want people to think that there are saturated fats hidden in my oats.
Solution: Butter up the sides, and mark the box "Holland Oats Light."
3. Dance Moves (or, like the mustache, lack-there-of). Poor baseline coordination, compounded by costume-constrained limb mobility is likely to create problems.