There is plenty to do in Michigan. If you can't find something to do, then you didn't try. You don't say where your husband works, but odds are you won't be living in Detroit. There are plenty of nice suburbs in the Detroit area and there are all kinds of family activities.
I live in Plymouth and I love it here. There are all kinds of community events throughout the year - childrens concerts, art festival, ice festival, fall festival, farmer's market, etc. We have a great downtown area for walking around, shopping, eating, and it even has an old movie theater that shows kid movies on Thursday afternoons through the summer. My neighbors are great. If any of us need anything, there's always another neighbor to help out.
There are zoos in Royal Oak and Toledo. There's Greenfield Village in Dearborn. There are waterparks within a reasonable driving distance. Frankenmuth is little over an hour from here. The local library always has kid programs going on. All of the popular live kid shows come through the area. Usually at the Fox Theater in Detroit or the Palace in Auburn Hills. In the last year or so, we've seen the touring productions of Mary Poppins and Wicked. We also saw Mythbusters Live. My kids are too old for the little kid shows, but the Wiggles, Sesame Street and all of those other shows come through here. In Detroit, there are the Detroit Institute of Arts, Detroit Science Center, and Detroit Historical Museum. There's a children's museum in Ann Arbor. I could go on.
And Chicago isn't that far away if you want to go visit.