I'm not very good at that limited-contact sport played on a rectangular court, basketball.
ha ha - I stink - I can't ever make a basket!  
It's most often played as a team sport with five players on each side, three-on-three, two-on-two, and one-on-one competitions are also common. I never get picked lol
Do you have to be a certain height?
I'm not sure if the NBA has a height requirement, but since the objective is to shoot a ball through a hoop that is mounted to a backboard at each end of the court, I'm sure height doesn't hurt!