https://www.usainteanne.ca/5-week
If your kids are interested in learning French, this is an amazing place to learn. A 5 week session of complete immersion if your pocketbook can allow. When my cousin and I went in 2001 it was only $1,500. It looks like it has increased a good bit sice then. They also have a 1 week session as well. You would be suprised hat you can learn in 1 week when you are immersed in the culture.
It was a scary experience, especially because I knew very little French when I showed up, but in less than 2 weeks I was thinking and dreaming in French. When we got back home we spoke nothing but French for several months and were easily able to communicate with my grandparents and other Cajun French speakers. Eventually we stopped speaking it as often and like most things you don't use for a while, you tend to forget. I can still speak and understand very little. It's a shame that I let it go. If it weren't for work and family obligations, I would go every year again to get back what I had. It was hands down one of the best summers I've ever had.