Conversation so far:
Where was Theodore Roosevelt born?
Theodore Roosevelt Jr.
was born on October 27, 1858, at East 20th Street in New York City.
Who was his mother?
socialite Martha Stewart "Mittie" Bulloch.
What type of work did his father do?
businessman and philanthropist.
Did Roosevelt have any siblings?
He had an older sister, Anna (nicknamed "Bamie"), a younger brother, Elliott, and a younger sister, Corinne.

Question: What were his interests in his early life?
Self-contained rewrite: What were Theodore Roosevelt's interests in his early life?