"I built this with my child and it was mostly delightful, but it took around a month of doing one bag / day (21 bags) and so as it got bigger moving it from a safe spot back to the table where we worked became more and more of a challenge. Once it was finished it really needs to be fastened together better. I'm sure it will fall apart after a just a litlle bit of play, but overall the engineering and meticulousness of the design and build were frankly draw-dropping. This is the 4th lego set I've built and it was challenging and fun way to spend time with my kid."