Help me make this T-Shirt design

Hi guys,

I want to make a T shirt with this type of design for myself and some of my friends who are graduating this year:

General idea:
main text: “I’m Done, Son!” with graphic of something related to graduation, perhaps like an academic cap logo. perhaps somewhere (maybe on the back) “class of 2010”

I have no photoshop skills, so if someone would like to make a quick mockup of this idea, it would be great!

I’m looking for more of a cartoony type of graphic, but feel free to get creative as i am open to many things.

If I decide to use your graphic/idea, I will send you a free shirt!