There are a few major milestones every child shares, like losing their first tooth or realizing that Darth Vader is in fact the father of Luke Skywalker. No one can truly become an adult until they learn this. 

When 8-year-old Anabella's father sat down and shared with her the beauty of Star Wars: The Empire Strikes Back, he filmed her reaction to finding out who Luke's father is, thus allowing everyone to relive this life-changing event.

Sources: reddit