The thing that bothered me the most was the scene where gooby constructs that rocket car. If they had just moved into that house how would they have had all the parts to construct that car just lying around in the garage? Also, Willie immediately recognizes the finished cart as the rocket car he had imagined despite the fact that it looks nothing like his illustration. They then proceed to wheel the cart into the woods and up a hill but willie is somehow surprised at how the wheels function. wouldn't he have noticed how loose they were while moving the car?