I guess I don't see my comments as manipulative versus creating a compromise
Why is substituing a personal "Bible Study" and creating a children's lesson using outside WTS material manipulating versus reaching a compromise?
She misses a meeting but still has spiritual sustenance and he also get to expose her and the kids to his beliefs outside of the WTS by using the coloring pages to show her and kids a common thread that runs through all of Xianity.
Perhaps he could throw in a Memorial attendance.
Even the Bible suggest talking about God to your children and what better place then out in nature.
It is a win-win situation for both and she can easily explain missed meetings by asserting headship issue.