Would your kids go for any of the Chex gluten-free cereals? They have a lot of crap in them too, that nobody needs to be eating, but what they don't have is wheat. Once my DD started eating them her cereal eating dwindled to almost nothing.
I used to have a similar problem with bread and butter. I made the kids sandwiches every night for the next day, so you can imagine how that was. I didn't feel terrible, exactly, but I knew that 250 calories in bread and butter everyday was not a smart nutritional choice for me. I also refused to think of bread as a "trigger" because I was working on not letting food have so much power over me. I just acknowledged that it was a food I liked and wanted to like less. I decided I would only eat the heels when I finished a loaf and the rest of the time I would make another choice. After a couple of months of that I just didn't look forward to the heels as much. I think it was a combination refusing to feel badly about bread and having a plan to eat it less and other things more. Now all the heels are going into the compost pile. DS has moved out and DD has decided she's going to have leftovers for lunch this summer so that might be the end of bread in the house. Yay!
CW-125, part calorie counting, part transition to primal
GW- Goals are no longer weight-related