Thinking Putty is a high-quality, silicone-based putty that is safe, non-toxic, and will never dry out! Each putty has its own unique properties and characteristics. All Thinking Putty bounces, pops, stretches, and tears. The sensory nature of the putty makes it a great tool for relieving stress, acting as an attention aid, and assisting in physical therapy for wrists and hands. From light-hearted pranks to physics-defying acts, Thinking Putty will constantly amaze you with its versatility both at home and at the office.Thinking Putty is inert, non-toxic, and safe. It contains no latex, gluten, wheat compounds, or phthalates. It is safe for use by people with sensitivity to wheat or latex and will not promote the development of latex allergies.