HomeDifficulty: 3/5 Download a PDF with the solve instructions for Convolution. View a video of the solving of the Convolution puzzle.ConvolutionSKU: 0017$26.00PriceOut of StockPRODUCT INFOItems are handmade and some variations are to be expected. RETURN & REFUND POLICYIf for any reason you are dissatisfied with their purchase we will exchange your item. Refunds offered for select merchandise. SHIPPING INFOItems usually ship in 1-2 days. Items ship via USPS from Austin, Texas.