Make small sparks with static electricity. Can be used to model lightning.
Science content (2016 curriculum):
Physics: Electricity, Electromagnetism (7)
Earth/Space: Weather, Seasons, Climate Change (K, 1, 4, 7)
Science topic (2005 curriculum connection):
Earth and Space Science: Weather (grade 4)
Physical Science: Electricity (grade 6)
Physical Science: Chemistry (grade 7)