The instructions should be re-evaluated. There is more than one area where the instructions tell you to use the wrong screws. They should label the screws and washers more clearly and separately package each size.Other than that, it was really easy to assemble, it took about an hour. It is a great play place for my kids.My kids don't usually LIKE to go outside a lot, but since we got this, they don't want to come INSIDE!!