I rarely just sit there, even when I’m sitting there. This works for me because I can be with my kids while still varying my mechanical environment. In a single hour I got both an hour of exercise and an hour of hands-on play/bonding.
What was most amazing to me was, although she never mentioned what I was doing with my body (or even looked right at me, really), at one point she started changing how she sat. “Look mom, I can sit like this too.” She then proceeded to demonstrate most of the sits I had cycled through.
Then she created her own movements, and I started to model what she was doing.
I was going to write more, but I figure, if my 2.5 year old gets it without an explanation, you can too.