Baseplate Bundle - 4 pack of GRAY or GREEN 48x48 - 15" x 15" Base Plat – Brick Loot
Buy LEGO Classic Gray Baseplate 10701 Building Toy compatible with Building Bricks for Kids Play (1 Piece) | Toys"R"Us
Whatever happened to baseplates? | Brickset: LEGO set guide and database
Amazon.com: LEGO Classic Green Baseplate 2304 Supplement for Building, Playing, and Displaying LEGO Creations, 10in x 10in, Large Building Base Accessory for Kids and Adults (1 Piece): Toys & Games