Gray Baseplates, 10 x 10 Inches Large Thick Base Plates for Building Bricks by Brickyard Building Blocks, Perfect for Activity Table or Displaying Construction Toys (4-Pack, Gray)Category: Base 10 BlockBOTTOM CONNECTIONS - Discover an exciting new design that gives you the added benefit of connecting LEGO® bricks from below to create multiple levels/stories. Our baseplates are 100% compatible and proven to work with LEGO® bricks and ALL other major brands of building bricks. Also fits square and rectangular LEGO® DUPLO® blocks. THE STRONGEST, TOUGHEST, AND MOST DURABLE BASEPLATE EVER MADE - Double the thickness and twice as strong. We guarantee you can feel the difference in quality. Our base plates have been tested to comply with all U.S. toy safety standards and are free of lead, cadmium, and phthalates. LEGO® and DUPLO® are trademarks of the LEGO Group of companies which does not sponsor, authorize or endorse this product.CONNECT MULTIPLE BASEPLATES TOGETHER TO MAKE EVEN LARGER BUILDING SURFACE- The edges connect together seamlessly and the square corners fit together perfectly with no gaps. CUTS TO ANY SIZE - Perfect for Do-It-Yourself activity tables and walls. Excellent supplement to the STEM education curriculum.AVAILABLE IN 7 DIFFERENT COLORS FOR YOU TO CHOOSE FROM - Available in green, gray, blue, sand (tan), pink, purple, and white. This package contains 4 gray baseplates.