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Ecology blocks: http://www.tworiverssandandgravel.com/wp-content/uploads/2010/04/ecology_blocks_imprinted.jpg http://www.tworiverssandandgravel.com/wp-content/u

by yutyut 13y ago

Ecology blocks: http://www.tworiverssandandgravel.com/wp-content/uploads/2010/04/ecology_blocks_imprinted.jpg http://www.tworiverssandandgravel.com/wp-content/uploads/201...

nkurz 13y ago
They are also colloquially known as 'mafia blocks' for some reason...