When my husband was younger he told me he used to assemble some plastic models. He said they were mainly of navy ships and that they were fun to do unless you lost a piece. My nephews like toy cars, I think they would like to attempt to assemble a car and I am sure there are many form a plastic model kits of cars that they would like to choose from. I think it would be fun for me, but I have never attempted it before. I think it is a nice hobby and my nephews will have a fun time if I am able to get one for them.