Even with a lot of pieces involved, with some help, my dextrous five-year-old grandson constructed the propeller plane (one of three in this set). I like that the set encourages interest in both the building and "flying" of the planes. It also has the capacity to inspire talk about how planes fly, what kinds of planes there are (including one from long ago, the propeller plane) and other matters that can interest a young child and be a continuing source of discussion. Being Lego, the planes can't take a lot of playing, but with care the set holds together nicely. My grandson loves it, and it's a contrast to some of the other sets he loves, including Star Wars.
And of course, the young builder is not constrained from using the bricks for other, unrelated projects of his own!