I've bought 3 of these the past 2 years.  I bought them for grandsons first birthday.  Two brothers have one each and race in them. They love the door and scooting all over the floor or yard.  Yes, they can be difficult to put together but I'm a 60 year old grandmother and did it myself.  Make sure the plastic is removed from the hole part and add a little oil to help parts slide together.  Don't hesitate to push hard.  This car is tough!