Cosmic Kids Yoga

Downloadable app for kids.  Two weeks free, monthly charge after that.

https://app.cosmickids.com/

GoNoodle

Grades pre-K through 5

GoNoodle® gets kids up and moving to fun, engaging content and games. Every dance party, yoga session, mindfulness activity, and game session is an opportunity for kids to wake up their bodies, engage their minds, and be their best.

https://family.gonoodle.com/