Not cheapest ever but cheapest in a while - normally $220+
Build, display and play with this intricately detailed, 3,036-piece LEGO Ideas 21318 Tree House playset. A complex build for experienced LEGO builders that all the family will love to play with, it features a landscape base and 3 LEGO tree house cabins—a main bedroom, bathroom and kids' room. The tree has interchangeable sets of green summer leaf elements and yellow and brown fall leaf elements—these and various plant elements on the base are all made from sustainable-plant-based polyethylene plastic—and the treetop and cabin roofs are removable to allow easy access. The model is packed with play-inspiring features including a buildable picnic table and seats, swing, bonfire, treasure map and hidden gem element to play out a treasure hunt, and a wind-up crane on the balcony of the bedroom cabin. A great birthday gift, this unique creative toy comes with mom, dad and kids minifigures, plus a bird figure, to role-play fun family scenes. It also includes a booklet with building instructions and information about this LEGO Ideas set’s fan creator and LEGO designer.
Price matching Target FYI.