I found some songs that you can sing with your little toddler or older baby while you do exercises for pregnancy!
Do your squats while doing the motions for this song. You stand up slowly from a squat as the snowman gets bigger, and then you drop down slowly into another squat as it melts. If you do it several times you will feel it!
Once there was a snowman
These are some songs with actions that you can do while tailor sitting:
If you're happy and you know it
Two little eyes
The wise man and the foolish man
Although technically you can sing about any song while tailor sitting, it's fun for the kids to do the actions with you.