My dad helped me build an interesting miniature car.
Why were you building a miniature car?
It was fun to build and to play with together
It's great to spend time with your parents, especially if you can build an interesting project along the way.  Parents can be more knowledgeable, and can teach you some skills while you work, and either way, you have fun together.  Try to tell your dad how much you appreciated his time.
I'm just glad he wasn't too busy for this project. He actually usually is other times.
I'm glad too. Your father should make memories like that with you in order to continue with a decent relationship. He can pass on the stories to his kids when they are born after that.