Last week I taught a Pirate Zencycle class! The 1/2 hour spin was to pirate music, I spoke in pirate and we dressed like pirates. During the 1/2 hour yoga practice I used pirate names for the poses and set it to a story of sorts.
Pirate Yoga Link to kids yoga stories for ideas
Below are links to a bunch of cool resources for Halloween themed yoga for kids and adults.
Youtube video with drawn images. Good for kids.
Pictures and a printable poster. Kids Yoga Stories is my go to more kids yoga.
Yoga poses in a chair.
a great series by Yoga International with pictures and directions
Halloween series of yoga postures with pictures
7 poses with pictures