Simplify the following text for a Grade 12 native English-speaking person.
Original: The band was a side-project of guitarist\/vocalist Tom DeLonge and drummer Travis Barker of Blink-182 , along with lead guitarist David Kennedy of Hazen Street , and touring bassist Anthony Celestino .
Simplified: Box Car Racer was a side-project for Blink-182 members Tom DeLonge and Travis Barker and lead guitarist of Hazen Street , David Kennedy and touring bassist Anthony Celestino .