Simplify the following text for a Grade 6 native English-speaking person.
Original: They named the university after their son , Leland Stanford Junior , who died at young age .
Simplified: It is named in honor of their only child , Leland Stanford , Jr. , who died in 1884 just before his 16th birthday . His parents decided to dedicate a university to their only son , and Leland Stanford told his wife , `` The children of California shall be our children . ''