We got this for our 3 year old's birthday and I thought it was going to take several days to assemble. I built it myself, with some help from my wife in between her chasing kids around, in a day. The directions could use some re-ordering to make it easier to build, and there is over 10 different screw lengths, which seems excessive, most of my time was spent trying to figure out which fastener went where, but otherwise got it built relatively quick. Kids love having a playground in their own yard now and very satisfied with the final product!