Can you make your slice of orange fizzy? Learn the chemical reaction between orange and baking soda. Gather baking soda and slices of oranges for this challenge with YELL 2020 teen intern Callie.

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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.