Simplify the following text for a Grade 5 native English-speaking person.
Original: Alexander 's father died on 6 July 1249 and he became king at the age of eight , inaugurated at Scone on 13 July 1248 .
Simplified: Alexander 's father died on 6 July 1249 and he officially became king at the age of eight . This happened at Scone on 13 July , 1249 .