Magnetic Putty 3.5" National Geographic Magnetic Putty: Educational Science Toy with National Geographic Magnetic Putty: Educational Science Toy with Magnetic Plasticine Mud Magnetic Silly Putty Handgum Magnet Smart Clay Make Learning Fun With These 5 Magnets FIRST4MAGNETS BLOG THE. Use a magnet to make this incredible putty come to life! National Geographic Magnetic Putty bends, stretches and bounces just like normal putty, but its embedded with millions of tiny particles that make it super magnetic. Contents: One ultra strong magnet, a handy storage tin and a fascinating, full color Learning Guide that explores the science behind magnetism. Interactive learning: Theres no better way for your child to explore the wonders of science then through a hands on science project. Age: 8+ Not suitable for children under 3 years