Educa puzzles are known around the world for their quality standards using green & blue boards (thick high quality paperboard) which create exact piece fits and greatly reduces puzzle dust. In addition to their reliable quality their service is exemplary; every Educa puzzle between 500 and 2000 pieces includes puzzle glue for preserving your success and they offer a Puzzle Piece Replacement Guarantee through which they replace any lost or missing puzzle pieces directly to the customer.