Calvin is building a snow fortress. He says it will be the strongest ever. He tells Hobbes to keep packing in on. The fort will be indestructible. He suggests pouring water over it so it freezes overnight. Their fort will be there until July. The next morning, Dad opens the garage door to back the car out and notices a wall of frozen snow running all across the yard, running right across the driveway. He yells "Where's that kid?!".