First up, I love taking special pictures for Dad to display at work, etc - - get your kids, make some letters (note, these letters have mod podged paper on one side and they're white on the other side - the letters "D" and "A" happen to be reversible, so they'll work either way) - or you could just print some letters out on paper, and snap a few pictures - - some samples...
with 4 kids you can do "Dad #1" - - see, my oldest is holding up a finger for #1
Or with more kiddos you can pile them all in and then put it in a frame that says "we love...."
And then if you need a gift idea, I love this shirt so much that I've made it twice - - you can find the tutorial here - - the front says "My DAD deserves a pat on the back" and the back has handprints -cute, right?!?
Father's Day Handprint Shirt new version
And here's a blurb of something Trevor wrote last year about Ode to the Underdog.