In this Australian import, the sixth in a series, two friends, Rose and Violet, launch a small protest to prevent the impending cutting down of the huge oak tree in a nearby park. They make small signs and put notes inside acorns in the belief that maybe others like them will take note of small things and stop the tree's destruction. Although things look grim for awhile, eventually, their efforts pay off in surprising ways. I really enjoyed how the girls came up with their own plans of action and didn't give up even when the weather and the campaign's uphill climb might have dismayed others. I also liked how Violet's stepfather Vincent is drawn into their efforts. The text with its surprises about the importance of the tree to others and the illustrations, created in pencil with digital ink, provide ready evidence to young readers that even the youngest among us can make a difference in the world. One of my favorite parts involved the petition asking that the tree not be cut down and how the girls decide to include the various animals who would lose a home and would have signed the petition if they could have. I love how Violet and Rose are giving a voice and a vote to them.