At least 5 players
All the players, except the first person who is It, sit in a circle. It walks around the circle, tapping each player on the head, saying “duck” each time until he decides to tap someone and say “goose.” That person becomes the goose and runs after It, trying to tag him before It can take his seat. If It successfully reaches the goose’s seat without being tagged, the goose is the new It. If the goose tags It, then the goose keeps his spot in the circle and It must either continue to be It for another turn or sit in the middle of the circle until another It is tagged.
Have fun, get some exercise, and make sure everyone gets a turn being a goose and being It.
Cool off on a summer day with this fun rule change: Instead of It tapping each player, give him a bucket of water and have him drip water on the head of each player until he picks the goose and dumps the whole bucket on that person!