When my girls get antsy and we can't play outside because either the weather is not cooperating or it is too dang early to disturb our neighbors, I like to pop in a yoga DVD. I pull out the yoga mats and we do the poses together.
We all enjoy YogaKids 2: ABC by Gaiam. There are 26 kid-style yoga poses and games inspired by nature and other familiar icons kids love. Imitating butterflies and alligators is certainly a good time for the entire family, and the DVD provides a nice introduction to yoga philosophy. It is a wonderful and physical way to hang out with your kids. Plus it provides a nice pre-run warm up. It is challenging for the little ones, but they are usually game for anything. It is also cool to see their yoga practice evolve as they get more coordinated.
Suggested age for children watching this DVD is ages 3-6. My 2 year old does manage to follow along for the first 8 letters of the alphabet, but then she sits and watches calmly as her older sister and I work our bodies all the way to the letter "Z."
Buy it for $10.99 from Amazon.