These 3 pieces combine for a 6x6 (x 6^4) plain board of 25mm-a-side hexagonal tiles for tabletop turn-based strategy games on a limited board.

I haven't gotten a chance to print them yet, so I don't know how they'll come out.

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Designed with TinkerCAD

1 copy of Core Piece
18 copies of Tri Piece
6 copies of Edge Piece

See Layout picture for assembly.