Simplify the following text for a Grade 6 native English-speaking person.
Original: Keselowski began his NASCAR career in the 2004 Craftsman Truck Series season , as the driver of the # 29 for his family-owned K Automotive Racing team .
Simplified: Keselowski started racing in NASCAR in 2004 in the Craftsman Truck Series . He drove a few races the # 29 for K Automotive Racing team .