But homemade gifts are also a hit (especially when the bank account won't quite support that new deluxe grill he keeps fawning over at Sam's Club) ;-)
These are a couple things we've made him in the past:
A collage of the kids fishing with their dad. The kids decorated the mat with special messages and stickers of their daddy's favorite things
I took a photo of our dog that my husband took one afternoon while they were out pheasant hunting. Walmart's photo shop is a fantastic place to play with pictures (they did the collage above as well). I sent it to them, blew it up, had it sent right to the house, and I framed it.
We've also made him video montages, coupon books for hugs and help with chores, and guilt-free time to go sit on a river somewhere :-)
Father's Day gifts don't have to be expensive to be a big hit. They just need to be thoughtful and filled with love :-)