A metal with an exceptionally low melting point of approximately 29.76°C (85.57°F). Visual Property: Because its melting point is near room temperature, it can transition from a solid to a liquid with very little heat. Availability: Science specialty stores. Safety Note: Gallium should be kept away from aluminum, as it infiltrates the grain boundaries of the metal and causes it to become extremely brittle. 4. Luminol

Exploring chemistry through safe, visually interesting substances is a great way to learn about the properties of matter. 1. Ferrofluid

A chemical that exhibits chemiluminescence. Visual Property: When reacted with an oxidizing agent, it emits a blue glow. This is often used in forensic science and biological research. Availability: Chemical supply houses for educational purposes. 5. Sodium Polyacrylate