Grimm's | Building Set WaveGrimm's Tiny Art Collection Grimms Building Set Wave Organic clear unseen. With its flowing, wave like forms, WAVE is an organically inspired building set full of softness and depth. The delicate curves are complemented by sharp edges, enabling exciting and unique building experiences. Our TINY ART COLLECTION showcases the wonderful contrasts of life for both young and old. Discover together the potential of strong color contrasts combined with