The biggest sign that summer is almost over is the Minnesota State Fair which starts tomorrow and runs through Labor Day. It is always the twelve days before Labor Day. Every year they add some new foods, as well as new attractions. The normal adult admission is $12, but they do have numerous promotional days that may fit your needs. For all the information on the state fair, click here for their website.
The other end of the summer event is the Renaissance Festival which started last weekend and runs weekends and Labor Day through September 29th. If you have never been it is an experience. Each weekend also has a theme, so choose the weekend you think would be most fun! For all the information on this festival, click here.