I'm thinking of canceling my health insurance and also my kids coverage.
Why would you cancel all your health insurance?
Well, they're adults now and thus it is time for them to take some responsibility
You need to still be there for your kids. It's not good just to leave them without insurance.
In the future they'll understand why I did it.
Don't you think it would be safer for their health if you kept them on your insurance until they can find a plan for themselves?