Lego mat as shown.
Apostrophe Games Large Building Blocks Base Plates Compatible with All Major Brands – 15 x 10 Inches for Construction Bricks – 4-Pack Multicolor for Table and Floor Use, STEM Learning : Toys & Games
LEGO DUPLO Super Heroes Batman Adventure, 10599
Lot of 2 Large Red & Green LEGO DUPLO base plate 15 x 15 24 x 24 studs
Large Lego Mat - Search Shopping
LEGO DUPLO: Green Baseplate (2304) for sale online
LEGO DUPLO Classic Brick Box Building Set with Storage 10913, Toy Car, Number Bricks and More, Learning Toys for Toddlers, Boys & Girls 18 Months Old
LEGO DUPLO Fire Station & Helicopter Playset 10970, with Push & Go Truck Toy for Toddlers, Boys and Girls 2 Plus Years Old, Large Bricks Educational Learning Toys : Toys & Games
LEGO DUPLO Green Building Base Plate 10980, Construction Toy for Toddlers and Kids, Build and Display Board : Toys & Games
LEGO DUPLO Fun Creations 10865 Building Blocks (70 Pieces) (Discontinued by Manufacturer) : Toys & Games
Celawork Large Baseplates Compatible with DUPLO, 15 x 15 Building Block Base Plates for Large Blocks, Large Pegs for Toddlers