Dow R-10, 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation in the Board Insulation department at Lowes.com
Amazon.com: Blue Polyethylene PE Foam 1.8 LB Density 24"x 90"x 1" Thick/Foam Packaging : Industrial & Scientific
Amazon.com: Blue EVA Foam Sheets, 30 Pack, 2mm Thick, 9 x 12 Inch, by Better Office Products, Blue Color, for Arts and Crafts, 30 Sheets Bulk Pack : Arts, Crafts & Sewing
First Choice- Blue Foam Master -1Gal - First Choice Auto Detail Supplies
1PC Foam Sheet Blue Thicken High Density DIY Crafts Dollhouse Model Upholstery | eBay
Smart Foam | Kids Indoor Foam Cubes | Modern Playroom Design CT & NY