Problem: One year old is centimeters away from getting whacked in the face by a belt buckle.
Solution: Quickly grab belt, give it back to father. In same motion, grab pad of large construction paper. Have four year old pick out color, then proceed to cut out an ankylosaurus tail. Reinforce top with packing tape, punch four holes, then lace string through holes. Tie onto waist of four year old.
Result: one year old retains unblemished face, four year old derives 20 minutes of pleasure from three minutes of effort. Great success.