If chemists made the chia pet...(DON'T try without adult supervision)

When baking soda is added to sugar and lit on fire on a bed a sand a variety of wonderful reactions takes place. See how carbon and sodium carbonate make get puffed up by carbon dioxide to make the incredible carbon snake.

Safety: This experiment does involve fire and flammables so it should NEVER be done without an adult. Always examine your surroundings before doing an experiment with fire. Make sure a fire extinguisher is easily available.