One of the more impressive and enduring LEGO sets for adults (well, ages 16+, anyway) is the LEGO Ideas Tree House. It's a massive three-unit tree house you can build with either green leaves or yellow leaves for an autumnal feel. It normally rings in at $250, but it's on sale for $75 off for Prime Day. Grab it before it's gone.

Hurry! Amazon Prime Day 2025 ends tonight, Friday, July 11, but you can still shop the best last-chance Prime Day deals from Laneige, Lego, Apple, and Yeti. Pick up Amazon Prime Day deals under $25 like comfy sneakers,

I search for deals for a living and these are the best Amazon Prime Day Lego deals I can find with Lego Star Wars, Marvel and space sets reduced.