The burgers will be cooked by 'Papaw' himself and will cost $2 each. You can also get a $25 t-shirt that reads, "I had a burger with Papaw." The money will go toward the grandkids' college education, and possibly some charities
Harmon told KVUE-TV about 3,000 people are planning to attend the cookout.
"No one would ever think that our Papaw would be the most famous Papaw in the world," he said.