""It's HUGE-MONGOUS"" is how my oldest daughter (5) described the completed Build-a-Fort Indoor Tree Fort when it was completed. She and my other daughter (2) helped my wife and I assemble the fort which took roughly 45 minutes from trunk to canopy. The un-assembled pieces were laid out nicely and were of high quality for being made of cardboard. The instructions were fairly straightforward but lacked detailed instruction for the sometimes complicated nature of locking pieces together. This is only a minor issue for two adults who can figure out how to put things together pretty well without step-by-step instructions, but for the more engineering-challenged parents, this could be a point of frustration. Finally, the instructions often referred to the numbering on each piece, stating that we should make sure to assemble the pieces in the correct order. However, there were no numeral markings on any of the pieces. My wife and I scanned the pieces left and right, up and down, without any luck in locating any visual indicators. We concluded that it ultimately did not matter how we assembled the pieces as they were interchangeable. Perhaps the instructions were not updated to reflect this fact, but it was a huge cause of confusion for a bit. Overall, everything locked together fairly quickly and the fort is indeed very sturdy. The locking mechanisms are a marvel in cardboard ingenuity, with only one or two tabs getting ripped to the point where I had to use duct tape to resolve…