Original Wrebbit foam backed puzzle pieces. Best Quality value and price ratio on the market. Highest quality of design and illustration. Creates a robust and durable gift for the serious puzzler and for all HARRY POTTER fans. Prior to the packaging process, puzzle pieces form a large flat whose sections hold together thanks to red-dotted pieces. Red-dotted pieces ARE NOT PART of your puzzle. They should be set aside until your Wrebbit3DTM puzzle is completely assembled as you may have inadvertently put aside a good puzzle piece. Once you have finished assembling your puzzle, you may discard all red-dotted pieces.