My 5 year old needed help with the Spiderjet, but he was able to assemble the Venom Mech on his own. They’re fun to put together and fun to play with. It’s a good value for one’s money, considering how pricey most LEGO sets are. The only con would be that the safe box opens too easily and the “gold bars/$100 bill” fall out. Thus, a nice prop but not practical when playing.