I used "Superman" gummy fruit snacks for Super Grover, Goldfish crackers, "milk chocolate rocks", sour gummy worms, homemade rubber ducks with yellow chocolate, bottlecaps candy, cookie crisp cereal & teddy grahams. I hid the "parts" in Easter Eggs b/c Easter was just last weekend. Everyone enjoyed 1st hunting for the eggs (whoever collected the most got a prize), then playing bingo. I had several leftover loot bags that I used as prizes, as well as a "big" prize for 1st and 2nd places!
Fishing Party--could easily be done at park for outdoorsy feel or bury a small plastic swimming pool in sand, maybe even put sand in the bottom of the pool and let the kids fish from it for the younger ones