Howcast -Learn how to do jackknives on a Swiss ball from certified personal trainer Amanda Edell in this Howcast ab workout video.

Howcast -Learn how to do medicine ball side twists or rotations from certified personal trainer Amanda Edell in this Howcast ab workout video.

Howcast -Learn how to do a pike on a Swiss ball from certified personal trainer Amanda Edell in this Howcast ab workout video.

Howcast - Learn the correct way to dribble a basketball from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn how to spider dribble a basketball from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn about speed dribbling from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn how to do a rolling around the arm basketball trick from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn how to do a spin around the back basketball trick from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn what lacrosse is from the pros at Game Breaker Lacrosse Camps in this Howcast video.

Howcast - Learn tips on bowling 300 from world record-holding bowler Byron Toth in this Howcast video.

Howcast - Learn how to do kicking drills from soccer coach Deejae Johnson in this Howcast video.

Howcast - Learn how to do heading drills from soccer coach Deejae Johnson in this Howcast video.

Howcast - Learn how to do a roundhouse kick from karate instructor Richard Amos in this Howcast video.

Howcast - Learn how to short pass and push pass from soccer coach Deejae Johnson in this Howcast video.

Howcast - Learn some dribbling drills from the Harlem Wizards in this Howcast basketball video.

Howcast - Learn how to spin a basketball on different objects from the Harlem Wizards in this Howcast basketball video.

Howcast -Learn the basic line dancing steps known as ball change actions in this Howcast dance video with expert Robert Royston.

Howcast -Learn how to play Kinect sports in this Kinect for Xbox video from Howcast.

Howcast - When an Italian inventor started producing large toy balls made of vinyl in 1963, great abs may have not been on his mind. But once you've tried this effective and gentle tool, they'll be on yours.

So you're staring at your un-knitted ball of yarn wondering, "What have I gotten myself into?" Fear not, a simple slip knot is the first step in any knitting project, so after this lesson you'll be an expert in getting started.

So you've won the chance to sink a half-court basket for a prize. Congratulations! Now here's what you've got to do to win.

Don't waste precious time bickering over the name of this classic drinking game—that beer's not getting any colder, and your logic skills certainly aren't getting any sharper.

Juggling—the noble art of jesters and fools. Here's how you can work your way up from juggling one ball to three.

How to have a snow ball fight