Cards with animal names written on them. Have one card per player. Scatter the cards all over the play area
Create teams of four or five persons in a file formation standing behind the leader.
The leader is the farmer.
The groups are named cows, ducks, pigs, sheep, roosters.
On signal, the teams rush out to find a card with the name of their team inscribed upon it.
They stand beside the card and call out : moo, quack, oink, baaa, doodle dee doo ( or other creative animal sound)
The farmer runs out and brings the animals in one at a time.
First team back gets to purchase the farm!