SKILLS THAT ARE TYPICALLY LEARNED IN CHILDHOOD THAT I SHOULD KNOW HOW TO DO BUT DON'T

Inspired by @Peace_Out_List. Knowing how to:
  1. Whistle
  2. Double Dutch
  3. Cartwheel
  4. What else do people learn to do when they're a kid?
  5. I can:
  6. Bike
  7. Swim
    Well, kinda
  8. Hula hoop
  9. Man, my future kids are going to have to figure this out themselves because I honestly can't think of any more things