My post is mostly referring to children, who even with step by step instructions, may have some difficulty. Look at the stickers on this space shuttle: https://

My post is mostly referring to children, who even with step by step instructions, may have some difficulty. Look at the stickers on this space shuttle: https://www.lego.com/cdn/cs/set/assets/blt6d09e0ada535ae04/10283_alt5.jpg https://www.lego.com/cdn/cs/set/assets/blt6d09e0ada535ae04/1... , which require fairly precise alignment. Or the tiles on the roof of rivendell: https://www.lego.com/cdn/cs/set/assets/blt0a0c82506f8bd960/10316.png https://www.lego.com/cdn/cs/set/assets/blt0a0c82506f8bd960/1... , and then there's topic of endurance with regards to larger sets. That being said, I actually revise my thesis. Looking back, Lego used to have age ranges listed: https://images.brickset.com/sets/large/7893-1.jpg https://images.brickset.com/sets/large/7893-1.jpg , however, it appears all sets now just list a single age with a plus sign. Thus it seems Lego has actually shifted more towards the age simply being capability, with the 18+ designation being the outlier.