Get A Picture On My Dads Headstone For Little Sister

I would like to get my dad a new headstone that says more than just his name I would like for it to have a picture on the headstone so when my sister goes to the cemetery she can see his picture with it shes only two and has never met him but when she looks at a picture she knows who it is. So I would like to get a picture added so she knows its him. Its for the princess in the picture. Please help