Tweens and teens may seem to be constantly on the go. But while they're go, go, going ... are they really being physically active? Encourage them to be more active this holiday season with gifts that either inspire physical activity or generate it.

When choosing active gifts for the younger set, keep fun in mind. While a pedometer might be a great tool for kids of any age, it's not exactly thrilling for a teenager to open a handsomely wrapped gift and find a pedometer inside. So look for items that not only promote physical fitness, but also generate some excitement. Check out the gallery for some activity-inspiring gifts for the tweens and teens in your life.