How old are Robert fultons children?

Robert Fulton, the American engineer and inventor known for developing the steamboat, had four children: three daughters and one son. His son, Robert Fulton Jr., was born in 1800, while his daughters, Elizabeth, Mary, and Jane, were born in the early 1800s. However, since Fulton lived in the late 18th and early 19th centuries and passed away in 1815, his children would no longer be alive today. Therefore, their ages cannot be determined in the present context.