Ages 14+. This Thinking Putty has unique and mind-blowing awesome magnetic properties! When Super Magnetic Thinking Putty is stretched, molded, or shaped, the putty has no magnetic charge and behaves like any other Thinking Putty. However, in the presence of a magnetic field, its magnetic forces begin to align. Suddenly, a truly Super Magnetic Thinking Putty is created that will attract to one magnetic pole and repel from the other. Made in USA! Each metal tin is hand packed with 1/5 lb of Thinking Putty, much more than in a plastic egg! You'll also find a super strong neodymium magnet in each tin.