A group of men leaves a building wearing a graduation cap and gown and holding diplomas, they enter another building and come out with a trashcan on wheels containing a broom and shovel. Looks likes it the department of street cleaners has some new graduates
A dog dressed on overalls walks to the front of a house holding a lucky horseshoe. He proceeds tp uses a nail to hammer the horseshoe to the front door and the whole house shakes as he bangs away. A wider shot shows that only the door is still standing. The rest of the house has collapsed.
A dog is painting a house but instead of paint, he dips his brush on a can labeled window. He proceeds to paint windows on the outside of the house. HE goes to another can labeled door and dips the brush in. He then paints on a door, completing the house.