The time I spent with my dad building a model of a turbofan jet engine - with real spinning blades - for our local science fair, is one of my fondest memories o

The time I spent with my dad building a model of a turbofan jet engine - with real spinning blades - for our local science fair, is one of my fondest memories of him. And while it is true that he helped a lot we also did all the work together. Just sayin'.