GUARANTEED COMPATIBILITY WITH ALL BUILDING BLOCKS FROM MAJOR BRANDS - Compatible with Duplo blocks and ALL medium/large name brand building blocks. Compatible with MEGA BLOKS First Builders. MEETS ALL U.S. TOY SAFETY STANDARDS - Made of high-quality plastic that have been tested to comply with all U.S. toy safety standards and are free of lead cadmium and phthalates. Because we're SO confident you'll love our baseplates it's backed by our NO-HASSLE SATISFACTION GUARANTEE. If you don't love it for any reason you can return it for a full refund. Manufacturered by Brickyard Building Blocks. LARGE & MORE SURFACE TO BUILD ON - Our 10" x 20" baseplates are the perfect size for children to build their creations on. They are large enough to build multiple figures on yet small enough to carry around with ease. THE ONLY SET SOLD ON AMAZON THAT INCLUDES A FREE TRAVEL STORAGE BAG - When not in use the baseplates can be stored safely inside the drawstring storage bag; perfect for home and on-the-go use. DISCLAIMER: LEGO and DUPLO are trademarks of the LEGO Group of companies which does not sponsor authorize or endorse this product. INTRODUCING THE NEW 100% COMPATIBLE BASEPLATES IN POPULAR PRIMARY COLORS FOR LARGE BUILDING BLOCKS - At last a premium quality baseplate set that contains green red blue & yellow baseplates.