I found a site to ruin what self esteem you have. Things Other People Accomplished When They Were Your Age.
Here's my list:
Francis Scott Key, after witnessing the bombardment of Fort McHenry, publishes "The Star Spangled Banner."
Judith Guest began writing her first novel, Ordinary People.
After defeating Antony and Cleopatra's forces in a naval battle, Augustus became the master of the Roman world.
Matthias Jakob Schleiden, a German botanist, formulated the cell theory of physiology.
Go in and put your age in. I dare you.