Hi Mike,
there is a STEM activity based on physical activity like an astronaut. It was designed for slightly older children, but could be adapted for younger classes.
You can find it as Mission X, Train Like an Astronaut, and a summary pdf is here: https://www.stem.org.uk/system/files/elibrary-resources/2020/12/English_all%20activities.pdf
With the Olympics this summer, astronauts on the ISS have been doing space Olympics again! Here they are in 2021: https://www.esa.int/ESA_Multimedia/Videos/2021/08/Space_Olympics_full_video
and this summer:
https://youtu.be/ycDoaIn6wuk?si=uyib_AXynFzF08QH