Well, I loved building this for my 4-year-old son, who is not quite old enough to do it for himself, and he loves playing with it, so it is win-win.It's actually a slightly more complicated build than expected, although 6 and above shouldn't have too many problems with it. When built, it's a decent size and I like the fact that the front lifts up and down and the tracks work properly (there were relatively fiddly to build though).Great price fast delivery exactly what I wantedGood set with lots of detail that my daughter loves. Caterpillar tracks work very well. As is always the case Lego have produced an excellent toy. Good that it also includes two mini figures.My grandson loves Lego and this didn't disappoint.Highly recommended. My son loves Lego. Another great model to add to his collection.