Check out these cool website:
NASA Space Place: spaceplace.nasa.gov/
Nasa Kid's Club: https://www.nasa.gov/kidsclub/index.html
NASA Star Child: starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html
Your age on other worlds: www.exploratorium.edu/ronh/age/index.html
NASA Space Place: spaceplace.nasa.gov/
Nasa Kid's Club: https://www.nasa.gov/kidsclub/index.html
NASA Star Child: starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html
Your age on other worlds: www.exploratorium.edu/ronh/age/index.html