NILO Base Plates Compatible with Lego Duplo - Reversible Double Sided: Lego Platform on One Side / Duplo Board on Reverse - Snap Fit 12x32 (Set of 2x GREEN) Compatible with Lego on one side Compatible with Duplo on Reverse 12 inches X 32 inches 4 fill Nilo N51 tables. 2 Block Mats included in purchase!