Inexpensive gift ideas for Dad

My dad has been gone for thirteen years now but since being married I've resumed the quest for the perfect Father's Day gift for my father-in-law.
This year my father-in-law is getting a special polo shirt that he has hinted at for the last few years. So, essentially, the quest this year was easy. However, in the past I've had to consider what to get the man who truly has everything. And how do you get a special gift (no ties, no tools) without paying very much?
Here are a few "out of the box" ideas that may work for your dad/husband/father-in-law...

1. Fishing license for either your own state or a neighboring state
2. A furry friend from a local Humane Society (only if Dad would really want one though)
3. An exotic overnight stay in a tepee or yurt. The Michigan DNR rents out tepees, yurts, and cabins in various State Parks. A few years ago, I bought a two-night stay in a real tepee in Cheboygan State Park downstate for only $75. Despite being an authentically made tepee, it had electricity! I know that tepees are also available in Baraga and yurts in the Porcupine Mountains. Wisconsin State Parks also have tepees available at Devil's Lake and Kohler-Andrae State Parks.

4. Learn from the experts about Beer, Cheese and Football. (Okay, disclaimer here. This is totally self-serving but it's about a cool event that many dads would like.) St. Norbert College Language Services is offering a series of workshops in July and August about Beer-making, Cheese-making and Football in Northeastern Wisconsin for $30 a class or $90 for the whole series. Check out the website at www.snc.edu/languageservices/culturalclasses/football.html for more information.
5. Thunder on the Lakeshore- Why not treat dad to a day of mechanical birds? This weekend Manitowoc welcomes visitors to experience a phenomenal airshow. Gates open at 8 a.m. both days. Admission is $6 in advance (can be purchased at Kwik-Trip locations) or $10 at the gate with kids 5 and under being free. Activities include sunrise balloon launches, an EAA Pancake Breakfast, K-9 police dog demonstrations, a Warbird flight review, historical displays and exhibits, entertainment, airplane and helicopter rides as well as a hot-air balloon event on Sunday night.
6. Admission to Dad's favorite museum or attraction. Our area is full of great attractions that Dad might like to visit. If he likes trains, take him to the National Railroad Museum in Green Bay. If he likes motorcycles, take him to the Harley-Davidson Museum in Milwaukee. Or maybe he likes boats? Take him to the Maritime Museum in Sturgeon Bay, the submarine in Manitowoc or the Shipwreck Museum in Paradise, Michigan.
7. For all Wisconsin and U.P. outdoorsy dads... don't forget that Cabela's is opening a brand new store within steps of Lambeau Field next month. A gift certificate to the sporting goods behemoth might be right up Dad's alley.