Now let's check in with Melanie -- she's outside in our Channel 4 parking lot with some very tough athletes. 3 Have you ever heard of roller derby? It is a full-contact sport for men..women...and even kids. The Jacksonville Junior Roller Derby team is for kids 8 - 17 years old. And these kids hit hard... Training up to 3 times a week on endurance...strategy and skill. Joining me now...so of the coaches of the Duval Roller Dolls ...with how YOUR kid can try out TONIGHT... 3 3 3 3 If you're interested in attending recruitment night... It's happening TONIGHT at Mandarin Skate Station from 6 to 9... That's on Kori Road...off San Jose.. 3 And if you need a little push to try out ...we're getting a LIVE demonstration after the break.. See what these girls can really do on the track -- NEXT.