Ecological Scavenger Hunt

Good activity for get-togethers at a beach or picnic/park area. Give the kids a list of items which must be found on the ground. Taking from garbage cans is not allowed! Points are awarded for each item and there is no limit for the amount of items retrieved. Also, bonus points for the most different items on the list are awarded. For example, if anyone brings in at least one of every item on the list, he might get a bonus of 100 points. If he brings back 7 different items, 70 points could be awarded.
Sample items: 1.) Candy wrapper 2.) Aluminum beverage can 3.) Plastic fork 4.) Paper cup 5.) Gum wrapper 6.) Pop or beer bottle, etc, etc.