Can you make color dyes float in liquid? Learn the properties of water and surfactants to float colors. Gather food coloring, whole milk, liquid dish soap/detergent, cotton swab, and shallow dish for this challenge with YELL 2020 teen intern Leah.

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.