SCS Direct Building Bricks - Large 10" x 10" Stackable Baseplate - Variety Pack Plates w Dual Connectivity (6 Pk) Compatible with all Major Brands GREAT DEAL - More base plates for less money! HOURS OF FUN for kids ages 3 and up. COMPATIBLE & GUARANTEED TIGHT FIT with all major building block sets. Classic size. GUARANTEED TIGHT FIT - Custom molded for Guaranteed Tight Fit PLAY TABLE - Great baseplates to build play table DURABLE & WARP RESISTANT base plates, sturdy enough for endless hours of fun