Simplify the following text for a Grade 6 native English-speaking person.
Original: The first production Model T was produced on August 12 , 1908 and left the factory on September 27 , 1908 , at the Piquette Plant in Detroit , Michigan . On May 26 , 1927 , Henry Ford watched the 15 millionth Model T Ford roll off the assembly line at his factory in Highland Park , Michigan .
Simplified: Ford began building the Model T in his Piquette factory on October 6 , 1908 as a 1909 model .