Grimm's | Giant Building BlocksGrimms Giant Building blocks are a classically beautiful natural block set, with 19 large geometric shaped wooden pieces, ideal, due to their width, for playing with outside on uneven surfaces as well as indoor play. Combine these blocks with other large Grimms wooden block sets to extend play and creativity. Grimms love wood because it is a natural material so it always has various markings that show up in our products, making each one unique. Grimms