During the Spring, the Facebook game "Farmville" released a new building called the "Spring Basket" to celebrate Spring and Easter. As a gift, each player was given 150 eggs to send to their neighbors. These work as currency to redeem for prizes from the Spring Basket. The most expensive and sought-after prize is the Dutch Windmill.
Instructions:
1)Open Farmville on Facebook and visit the Spring Basket. This page will show the price of the Dutch Windmill (150 eggs) and show how many you have received so far.
2)Acquire 150 Spring Eggs from your neighbors. Each player is given 150 eggs to distribute, but you can only redeem eggs that were sent to you. You can post on your Facebook wall to request eggs from your friends.
3)Visit the Spring Basket and click "Redeem" under the little Dutch Windmill icon. Once redeemed, the windmill will be automatically be added to your inventory and be available for use on your farm.
Source: eHow
