Unlike some of the other movie related Lego kits this one doesn't fall apart when played with after being built.
My son bought this with some of his 6th birthday money and was delighted with it. He built it on his own from start to finish in an hour or so. Only balancing the axle evenly caused him to ask dad for assistance. Of course dad then decided that all the stickers that had been applied needed straightening, but that's just his OCD!
Personally I'm more old school with Lego, prefering the kits that can make a series of different items from the same parts. The tendancy with these movie sets is to build it once a leave it built and for me that's not what Lego is about.