It is no secret that I like open-wheeled racing. It is difficult for me to keep track of it all except for a quick glance here and there. You have carting, of course, for everyone that aspires to be a racing driver these days. In the States you have the USF 2000, Stat Mazda, IndyLights, etc. to help carry you forward. In Europe you have Formula Two and Formula Three to do the same. There is a 20 year old from my former State, Michigan, that racing in unique situation....he is paralyzed in both legs. Injured in a motorcycle accident when he was 12. He is racing in the USF 2000 series. Take a look at his website:
video credit: 2012 youtube.com