These fun building block stress balls are a great way to promote team unity and skill building in the workplace. Our handcrafted polyurethane foam stress balls are a fun way to promote your company, organization, hospital or school, while also helping everyone who receives one squeeze away the stress of everyday life! We offer hundreds of creative shapes to meet the needs of any promotional program! Note: Due to their handcrafted nature, stress ball sizes, colors and textures may vary. Factory cannot guarantee consistent imprints or PMS matches. Not intended as a child's or pet's toy. Note: While pieces do stack like traditional building blocks, they are sold individually and not as a set.