KR Bags Bowling Bags. This Single Roller is Perfect of any Jr. Bowler, Jr. Bowlers at heart, collectors, and anyone looking for a fun bowling ball roller.This great looking Cartoon Network roller bag can also be used as a backpack for school or weekend trips. This single roller features colorful designs of some of Cartoon Network's most popular characters including Blooregard from Fosters Home for Imaginary Friends.