Every year I have my students make a book for their father/grandfather/uncle/etc. They write about things they do with their dad, why they love their dad so much, etc.
(This is how the Mother's Day books turn out!)
If you're interested in making these with your students, I've put together a packet with instructions, graphic organizers, writing plan sheets, and a fun fill-in-the-blank. Templates for dads, grandpas, and uncles are included (as well as moms, grandmas, and aunts...and a blank template too!)
I'll see ya' next month!