Can you manipulate molecules? Learn about how the states of matter work by making clouds. Gather a large jar or vase, hot water, matches, a thin tray and ice for this challenge with YELL 2020 teen intern Annabelle.

Tune in to SFPL YouTube.

STEM Challenge Yo’Self | Teen Takeover is created by the San Francisco Public Library from the Youth Engaged in Library Leadership (YELL) STEM team. Stay STEM-tastic by reading, learning and experimenting at home. Gather materials for a new challenge posted at 3pm on weekdays throughout October. Visit www.sfpl.org/stemchallenge for more resources.