Great project idea!
If he wants a catchy, less scientific title, how about "The Recipe for Success" or "Is Success Sweet?" or "Is it Sweet Success"? or, if he finds out that sugar is the key to being favoured, "Success is Sweet"?
Or how about "The Not-So Secret Ingredient"?
Or how about "Cereal Killer"? Might not be appropriate for grade school, lol! Totally OT, but a friend once dressed up for a Hallowe'en party by attaching a bunch of single serving cereal boxes to his shirt and jeans, and splashing some fake blood on him. He was a "cereal killer".