"Bought this for my son a few weeks ago as he is 4 and just now getting heavy into Legos. He picked this one out due to his love for monster trucks as well. He LOVES it!! It was easy to build and he did most of it by himself. I did have to help him with where the pieces went, but he put it together by himself. The one con I have with this is that the spoiler seems to come off or fall apart fairly easy. The top where you out the driver in seems to just sit on the piece instead of snapping on too. I don't know if we just got a bad one or its just the way it was built. Overall he loves this and plays with it for hours."