Mix your ingredients for a cake: butter, eggs, sugar, flour. Pop it into your cake tin but do not use a spatula. Such an implement is too efficient, wiping the bowl clean of mixture. Instead use a spoon and hand the mixing bowl over to your daughter, eagerly awaiting to devour the mixture remnants......that is if her Dad doesn't get there before her. Smile when you see raw cake leftovers, smeared around her mouth or his.