My almost 5yr old has all the sets of the Lego Ben 10 range, this being the final one he received in the series. It has been made, unmade, put together with the other sets in the series. He absolutely loves playing with it, great for the imagination, very durable and easy for him to construct.
Unlike other Lego products which bits tend to fall off of, this one stays together so can be taken out of the house - which it has been on several occasions.
So if you have a Ben 10 fan who loves lego then this might be an ideal item for your child too.