Splashing down by the forest stream usually means a fun afternoon of exploring, but today, Zoey and her cat Sassafras have stumbled onto a terrible discovery. The beautiful water where their magical friends live has become polluted, and the gentle merhorses who call the stream home are in serious danger! When you are the one responsible for the magical animals, you have to jump into action immediately. You will need your sharpest observation skills and a trusty science journal to help Zoey figure out exactly what is ruining the water. By setting up real scientific experiments, you will test the stream and learn how different materials affect the environment. Can you help Zoey and Sassafras solve the mystery of the bubbles and clean up the habitat before the merhorses are forced to leave forever? Get ready for a watery adventure that proves that even the trickiest magical problems can be solved with a little bit of science!