Hand gum is also the silly putty,thinking putty,both a solid and a liquid. It behaves like a liquid. If you let it stay on the table,it will tend to turn into a flat blob slowling. But if you throw it(shape like the ball) against the floor, it will bounce. You can twist it and stretch it. It can be made to any shape and doesn’t stick to your hands or anything. It attracts to all groups of people, great fun for kids (for ages 4 and up only), and cool office toy for adults.