CrazyGuy.....You sound like you are in a bit of a panic...and I don't blame you one bit. Panic just scatters your thoughts though so try to calm down. Your kids need you to take a stand from a strong position. The only way to do that is make sure of what you are talking about by researching. Lots of good ideas shared over the years here on jwn ....do a goggle search. Just pick a few problem areas and work on your critical thinking...once you've got it, memorize those key points to explain those things to the kids.
Don't give up...be honest with them but don't always just tell them show them.............Museums etc are excellent ideas! Kids just love fun so be a fun Dad, you don't have to use a heavy hand with them ...joke around, laugh at your self ...ask them how they REALLY feel about all this stuff and be nice about it. You are smart Guy so I am sure this will turn out just fine in the end.