Temba Tseri is one tough, courageous, kick-butt dude. He makes Ray Lewis and The Rock look like pansies. The 15 year-old Temba became the youngest person to reach the top of Mount Everest.

Freeskiing may be the most dangerous winter sport around. There's no time clock and no marked course. Skiers pick their own route by flying off cliffs, jumping over rocks and dodging trees.

You don't have to be some kind of circus freak to learn to ride a unicycle. Kidzworld asked Unisteve the Unicyclist for some tips on learning to ride on one wheel and he gave us the answers.

The Mongoose Varmint is perfect for beginner mountainboarders. It's strong enough to stand up to tough terrain and big wipeouts, but light enough for riders to get big speed and big air.

A sickly-sweet new snowboard has arrived this winter and it's more fun than a mountain packed with fresh powder. Check out the Kandi from K2 - a snowboard designed especially for girls who love to ride.

Imagine racing down a mountain on a modified snow shovel or jumping out of an airplane and landing on a ski hill. Kidzworld looks at some of the world's wildest and wackiest winter sports.

Is this guy stupid or extremely brave? Whatever he is, he was the first person to snowboard down the world's highest mountain!

It's part bike, part skateboard and the coolest way to get around on two wheels. Check out Simon's look at the Dirt-Dawg Scooter.

Extreme mountain biker, Chris Duncan, gives Simon all the dirt on landing big airs, breaking bones and picking up dog poop.

Find the best snow conditions, buy some new gear or check out sick pics of your fave powder hounds. The mountainzone has it all.

Looking to get a new ride this summer, but not sure where to start? Check out these tips for buying a new bicycle.

Riding a unicyle isn't as difficult as you might think. Kidzworld checks out the single-wheeled world of unicycling.