Glue 4 popsicle sticks together to make a square shape.
Glue 4 more sticks on top of those, also in a square shape. This will give you a "slot" to add the photo. Let glue dry.
Cut two pieces of foam craft to fit the top and bottom of the frame. You'll want them to be slightly shorter than the width of the frame. On one, paint "My Dad" and on the other, paint "Rocks". Let dry.
Trim your photo and insert it into the frame. Be sure you don't trim too much to start...you can always cut more off.
Flip the frame to the back. Add a drop of glue at the top of the photo and a drop of glue at the bottom to hold it in place.
Glue your craft foam to the top and bottom of the frame, then add rocks.
Finally, glue a popsicle stick to the back, at an angle, to act as the picture stand. Make sure you use a good amount of glue so that it stays put.
Once the glue dries, you're good to go...you've got the perfect Father's Day gift for dad!