We have given our son to the set 6th birthday, and he alone has assembled it with no problems and then three days played with it, then built it apart, built new self-invented buildings from which disassembled again and now he already builds it together again. So game worth at least 5 Stars. Optics is great, there are many clear turquoise blue and orange stones here, which make the whole thing look really cool. Wheels are movable so you can transform it from a car in a kind of spacecraft or other flying object. The Infearno, "The Evil One" as my son calls it, looks cool too and is perfect to organize so as opponents of the agent guys-typical role playing. Oh, and - gaanz important !!! - They can all shoot! ;-)