When I was maybe five or six, I nailed two little boards together into a cross and whimsically spray-painted it black. I threw the cross across the yard with the expectation that it would fly. I told Dad about my disappointment and he explained that there was a bit more to making something capable of staying in the air. Next was a trip to the toy store for a proper glider. He did explain that most of the weight had to be in front of the wings for an airplane to fly right. Nurturing my interests was a priority for Dad.  This helped put me on a trajectory for an education in aerodynamics and my passion for windtunnels.