Extreme Sports for Kids: Would You Let Your Child Do Them?

KJ Olson-Weston poses with his half-scale monster truck, Monster Bear. KJ rides with Team Kid KJ, which includes his younger brother and other young monster truck drivers. (Uncle Tod's Motorsports, Inc./AP Photo)

Kaid Jaret Olson-Weston isn't out of grade school yet, but later this month he'll drive his own custom-built monster truck at a monster truck show in Wildwood, N.J.. Lane Huszar was riding bulls by age 10. And Jay Cramer began competing in motocross races at the age of 4.

These kids are all doing what some may call extreme sports with their parents' permission. Sometimes, injuries happen: Cramer once broke his arm during racing practice when his bike sputtered just before a jump and then broke it again just months later. He is now recovering. His father said his son wants to return to racing and hopes to be cleared by doctors to participate again by Thanksgiving.

"We take every precaution we can to keep him safe," Cramer's father, Jason Cramer, told "20/20? after the first accident. He noted that his son wears a protective neck brace, a Kevlar vest and other equipment when he rides. "He could have broken his arm playing football too. It's just a risk that you take when you're involved in what could be a contact sport."

Would you let your child participate in an extreme sport? Vote below and learn more about these incredible children and their parents Friday on "20/20? at a special time, 9 p.m. ET.