Me too. I was about ten, and I remember him appearing on TV, somberly announcing his wage and price control plan. In front of him was what looked like the Encyclopedia Britanica.
I remember thinking, "Wow, you must have to be really smart to be the president. Who could understand something so complicated?"
Me too - the plan actually made sense to me - when I was 14 years old!
Of course I then went on to live through the rest of the 70s and 80s and learned better.