Well, I'm a dad, not a mom, but do a lot of the cooking in our house, and we just finished a Whole 30. For over a year previous, I had been the only Primal member of the family, but this Spring my wife decided to jump in to see how it would work for our kids. The big difference during the 30 was that there just wasn't any non-Primal food in the house. This is key, or else someone will reach for the bread or sweets. My daughter (8y.o.) went from fickle to asking for more steak and green beans. We also discovered her love of vichyssoise! (with the kids we didn't rule out potatoes for the whole 30) My son is weaned from his sugar. Both their energy levels and emotions seem more steady and stable.
Thing is, you have to really stick it out for 2-3 weeks--it was a bit of a tough adjustment, but would have been near impossible if there were other options in the house. This is where your husband comes in! It can be tough to avoid strife if someone is feeling dictated to about their food choices...but if he would go for it for 30 days, you both might see some great changes in the kids and feel it's worth it. Good luck.