I imagine that it would be difficult for your marital relationship if you started teaching your children TTATT directly, or started sharing with them your religious beliefs.
The better approach might be to teach your children certain core values and principles that are antithetical to JW indoctrination. For example, you can teach them to value logic and critical thinking. Teach them the importance of independently researching claims and not accepting things at face value. Teach them to value intellectual honesty. Encourage them to think outside the box and not let anyone stifle or discourage their freedom of thought. Basically teach them skills that would help them to see the JW indoctrination for what it is and be immune to it.
You can even use movies to do this. You watch a movie with them then afterwards you can have a discussion about what lessons can be learned from the movie. Take Tangled, as an example. Rapunzel was forbidden from leaving the tower and so she had no way of knowing that the evil witch was misleading her. This can be used to teach your children that they should not be afraid to question the validity of claims made by an authority and that they should be wary of any authority that forbids them doing independent research to verify its claims or that tells them not to listen to what its critics have to say.
All of this can be done without ever mentioning religion or Watchtower. When you do this your children will discover TTATT on their own, and they will "make the TTATT their own".