Can you change the color of a white flower by adding food dye to the water? Learn the science behind the water transportation system inside of plants. Gather a scissor, white flowers, cup with water and food dye for this challenge with YELL 2020 teen intern Elio.

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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.