Offered to my 4 year old son and a half for Christmas 2014, he is delighted. He lost a small dark room on the side from the first assembly when he was very careful. He had two other boxes of Lego creator for Christmas always with great success. Since it mounts and dismounts the almost daily. It's perfect to be quiet while I do homework to his sister 6 years while the kitchen by throwing an eye to his little brother 11 months. He knows he must settle on a high table, pouring its parts bag in a tray and use cover to get his pieces. If one of them falls, he must pick it up immediately. Sometimes it irritates when there is not a room but it is able to mount and dismount his lego all afternoon to achieve the 3 models.