Teaching yoga during the school day is often a well received break both for the kids and me, it might be a 2 minute heads down meditation, a 5 minute stretch or 10 minute activity with a partner but it creates that space, break and downtime they so often need in an often overstimulating day where they simply haven't stopped.
Yoga outside the classroom is quite different and less structured as I'm discovering and needs to be approached in an entirely different way. When you have a lovely bunch of characters aged 22 months up to 4 years you do have to go with the flow. I also believe that children have a lot to teach us. This morning, they taught me to be more playful, not to take myself seriously, to connect with the moment and have a plan B.
It's good to have a theme and weave it across the lesson but also to have lots of other ideas to pull out the bag.
For more yoga fun with your child check out cosmic kids on youtube.