Easter Basket
Easter Baskets were available over the 2010 Easter weekend by visiting a location and double-clicking a red basket that was locked down on the ground, the location of which was determined by following colored eggs that formed a trail.
Using the same graphic as the Basket of Herbs from the Spring Décor Collection, the Easter basket places an Easter-themed item in the holder's backpack. Each basket has 10 charges.
Rewards include: golden chocolate rabbit, green chocolate rabbit, Easter grass, robin's egg.
Sources
Forum Post on Easter Baskets [1]