Need any and all ideas for things to see and do in Michigan

I appreciate all of the information y'all have posted. We are going to begin our Michigan tour at Holland, Michigan May the 6th, for the Tulip Festival. My Mom who would be 102 years of age worked at the festival as a young girl as a dancer in wooden shoes. For years it has been on my bucket list to go where my Mom had been. From there we are going up the west coast, stopping wherever there is something of interest. Across the bridge and spending much of out time in the UP. We have a relative in Crystal Falls who we visit yearly. So many places that have been recommended, we've been to over the years. Copper Harbor is high on our list to see for the first time. Can't do the Royal boat trip ($$$) Love seeing places recommended that we've been to because it sounds as if we made good choices. Thanks y'all.