I was slightly worried that it wouldn't really feel like a birthday celebration with just the two of us, but I was raised by the Cork/Mink women and one thing they taught us is how to celebrate. I was, however, on a birthday budget, so I had to prioritize gifts, food, and entertainment.
He had one of the maple bacon cupcakes I made him for breakfast (gross!), got a workout in, watched some football, and opened presents.
The weather was beautiful so I took him for a drive to a farm. On the way I stopped and bought him a couple new CDs (those still exist?!) for our ride and he was very considerate to choose to save the heavy metal one for later listening. :) At the farm we completed a giant corn maze, a first for both of us! We got to pet some farm animals (calves, pigs, chickens, etc), race rubber ducks, play in a corn pit, and launch corn out of some machine similar to a large potato gun. The entertainment options for a Saturday afternoon in Wisconsin are quite different than those in Tennessee!