This is a really cute, and free, printable from Create.Craft. Love. You can print it from the link, or if you want to get really crafty, you can print the poem on card stock with your with your little one's very own foot prints! Use it on a father's day card for daddy or grandpa, or even frame it for daddy's desk!
Another free printable from Kinzie's Kreations, this one is great if you have older children who can tell you what they think about their daddy :) I love these! I think it's so funny to hear what a three year old loves most about his or her daddy, and it'll make a great memory ten years from now!
You'll need a frame, a camera, and a photo printer (or send it to get printed at your local store!) for this one, but you can find step by step instructions and even the cute word art at Positively Splendid! So cute! They even have one that says "Grandpa", "Papa", "Dad", etc, depending on what you call the special guy in your life :D