My boys are too small so yes we buy DH gifts.
The first Father's Day I got him a mug with a picture of DS in it and a message that says happy 1st Father's Day love from DS.
I can't remember what I've got for the others but generally I also buy things for a nice breakfast at home.
This year I've bought him an expensive new beard trimmer and 2 shirts from the boys and tomorrow ds1 will help me make some pancakes and bacon and eggs or smoked salmon and eggs for breakfast. We also haven't written in his card yet so will get the boys to scribble on it in the morning