This week, 17-year-old Colby Parker will pack his tuba and travel to Washington, D.C., where he and 19 other Presidential Scholars in the Arts will perform for President Obama and a crowd at the Kennedy Center on June 20. While 16 of the artists were selected from other disciplines and 121 other Presidential Scholars are being honored for overall academic success, Parker is one of just four instrumentalists chosen from the entire country. As if that were not enough, on July 3, he will arrive at the ultra-prestigious Tanglewood Music Center in Massachusetts for six weeks of study and performance, further polishing his musical expression at the summer home of the Boston Symphony Orchestra.