We made our veggie burgers and put it on the bun. Put ketchup, cheese, or whatever else you like then add the top bun. Put lettuce on top of that. Cut pieces off of the pickle for the head and legs. Slice 1 pickle and add that to the top of the lettuce. We added edible eyes, but you could use a cut up raisin.
Such a easy burger to make and this actually got my then 4 year old to eat lettuce on his burger for the first time. He thought it was cool to eat the shell!