How old is a 8-year-old on Uranus?

About 0.1 Uranus years old

On Earth we count years by Earth's orbit (about 365 days).Uranus takes 30688.5 Earth days per orbit, so someone who has lived 8 Earth years has completed fewer full orbits — hence a different "age."

If you lived at Uranus's pole, you'd see one sunrise per lifetime. The sun would spiral around the sky for 42 years, then set for 42 years!