Parents dumped me in the pool when I was like 6 years old and had me thrash about in order to save my own life. That was not a fun experience.
Bike, I vaguely recall my dad teaching me how to ride without training wheels, but I can't remember at what age.
Reading... parents taught me how to read Korean. Teachers at school taught me how to read English. I used to be really really crappy at reading English. Stumbled over words all the time and I hated popcorn reading time in class. And then one summer I was just like, f-that! And I read a crapton of books on my own. Now I read like a book a week and my vocabulary is better than anyone I know. How do you like me now, suckas???