Can you manipulate molecules? Learn to create your very own cloud as well as discover the fascinating scientific concepts behind it. Gather a glass jar with a lid, 1/3 cup of hot water, 4–5 ice cubes, hairspray and a few drops of dye for this challenge with YELL 2020 teen intern Sharon.

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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.