Guess who the granny is by how they grunt. You need a blindfold and broomstick.
All players stand in a circle except for "it". Choose one person to be "it" who is blindfolded and stands in the middle of the circle with a broom in hand. "It" tells all the players move, then tells them to stop. Then "it" spins around and sticks his/her broom handle out. The person nearest grabs it and "it" says "granny grunt". The person grunts and whoever is "it" tries to guess who the granny is. If the guess is correct, that person now becomes it in the middle.