Sometimes I think 10 year old Adrian was sort of brilliant. At that age my brother and I came up with the Peanut Butter Ball (TM).
Take a bowl, put in some peanuts, other nuts, raisins, chocolate chips, or whatever you like. Put a blob of peanut butter and roll it around picking up stuff, Katamari-style, until you have a peanut butter ball covered in delicious stuff.
Take a bite out of it. Push the freshly revealed peanut butter into the bowl again, picking up more stuff. Continue until all the peanut butter and treats are gone.
I tried this again the other day: still good.