I did a similar scavanger hunt for my kids at Easter they woke up and found one egg in the middle of the floor the hunt lasted for thirty or forty minutes they had an egg in the mailbox in the car, the chicken coupe at thier grandparents (they lived next door) to mention a few they ended up finding thier easter baskets in thier treehouse. it was great make sure you videotape it it is wonderful to see how well a kindergartner and his baby sister figured out the clues and how excited they were when they finally got all the loot.
Mandy
TX