• These fun building block stress balls are a great way to promote team unity and skill building in the workplace. Note: while pieces do stack like traditional building blocks, they are sold individually and not as a set. • 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! • Copyright. 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.