M.C.
"Junie B's Wanna Bs"
You could have the cereal be letters (A - Z) or just a bunch of B's. You could have shapes - a dust pan, a cape, paint brush, a pencil, handcuffs (infinite symbol)
On the back of the cereal box you could have a 'recycling' maze leading to a trash can, or a design the house, or a game where the cop finds the robber.