Ignite sugar and baking soda to make black snakes of carbon puffed up with carbon dioxide gas.
Science content (2016 curriculum):
Chemistry: States of Matter, Properties of Materials (K-7)
Chemistry: Atoms, Molecules (3-7)
Chemistry: Chemical Changes (2, 7)
Physics: Energy forms, Conservation of Energy (1, 3, 4, 5)
Science topic (2005 curriculum connection):
Physical Science: Chemistry (grade 7)