People were particpating in a collective game. Each had to create their own unique game to sort marbles. Weird thing is the people were associated with the kink community even though this contest was vanilla. I don't recalling seeing their solutions, but I know I made a series of six funnels with Scrabble tiles. In one state, it was merely a board but when put into use the Scrabble tiles would unfold to create inverted stepped pyramids with a hole at the bottom for the marbles to pour out into a container.

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