Kids nowadays are far more resilient and sophisticated than we adults give them credit for. Certainly much moreso than we were at their age.
Don't worry, your kids will probably have much less difficulty in making the adaptation to living in your new host country than you and your husband are going to have.
Before you know it, they're probably going to be helping the two of you adapt, or pushing you to do so more quickly. Funny how that goes, but as an educator I can tell you it's true.
Cheers,
William James Woodward, °µÍø½ûÇø-blog Experts Team