This set includes one gray and one blue baseplate. Expand your creative possibilities with the Plus-Plus baseplate! This durable platform can be used to build a scene, make a spinning top, and much more. Connect baseplates together to make multi-story structures! Compatible with all regular-size Plus-Plus pieces. Each baseplate measures 4.5" x 4.5" (114mm x 114mm). Plus-Plus pieces sold separately. Suggested for ages 5-12. Designed and made in Denmark. BPA-free and phthalate-free.