Simplify the following text for a Grade 11 native English-speaking person.
Original: The 2010 Summer Youth Olympics , officially known as the Singapore 2010 Youth Olympic Games ( YOG ) , were an international multi-sport event for youths that took place in the city-state of Singapore from 14 to 26 August 2010 , in the XXIX Olympiad . They were the inaugural Summer Youth Olympics , a major sports and cultural festival celebrated in the tradition of the Olympic Games .
Simplified: The 2010 Summer Youth Olympic Games , officially known as the I Olympic Youth Summer Games , is an international summer sports event that was celebrated from August 14 to August 26 , 2010 for youths .