5 Sheets White Foam Boards--Sand Table Building Model Materials 2mm / 3mm Thick Foam PVC Sheet Poster Board Mount Board for Mounting, Crafts, Modelling, Art, Display, School Projects - Walmart.com
White Foam Board (Standard Sizes) - Columbia Omni Studio
Elmer's 3pk 16" X 20" Foam Presentation Boards - White : Target
Foam Board 32" x 40", 1/8" thick, White
Amazon.com : AKOLAFE 30 Pack 10x8 Inch Foam Boards, 5 mm Thick Foam Core Board 1/5 Inch White Foam Sheet, White Polystyrene Poster Board Signboard for Presentations, School, Office & Art Projects : Office Products