4,999,999 three-leaf clovers. One four-leaf clover. Pick them by hand, sell them for a cent each and work your way up to scythes, mowers, tractors and a combine harvester until you finally find the one. Alone, or with up to three friends.
Search a vast clover meadow for 50 rare specimens. Harvest by hand, upgrade to tools and garden machines, carry your crop to the buyer, and pour it out yourself. Bring special finds to your display cabinet.