"Working together, the tribes had to climb over a wooden frame, a barrel and a see-saw to an overhanging net with wooden blocks above it. Using sticks two tribe members would knock the blocks out of the net. Once they had all of the blocks they would stack them into a tower at a platform. The first tribe to complete their stack and get back to their tribe mat would win immunity." ~ @SurvivorWiki
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Proceed to tribe events.