Walmart has the LEGO Ideas Tree House Set for only $169.99 Shipped! (Reg. $200) Build, display and play with this intricately detailed, 3036-piece LEGO® Ideas 21318 Tree House toy playset. A complex build for experienced LEGO builders that all the family will love to play with, it features a landscape base, tree that can be built into different shapes, and 3 LEGO tree house cabins, a main bedroom, bathroom and kid’s room.