Continuity mistake: Rebecca says Danny had reseeded the grass, and it would take 3 weeks to grow, and that's why Jesse had to build the playset inside instead of the backyard. But later that very same day, when Stephanie throws Kimmy's shoes into the backyard, you can see the lawn has fully grown grass.
Other mistake: When Danny enters the bathroom, there is a window in the wall next to the door with daylight coming through. Yet according to the house plan, the stairs to the attic are supposed to be located behind this wall- the door to them is even seen in the background as the pizza guy passes them in the hallway. (00:04:50)