Elinor and Olive check on their class plants before they leave school for the weekend. The plants have sprouted since they were planted as seeds. Now they’re one crayon tall! The friends are pleased with their progress. But when Elinor and Olive get back to school on Monday, they discover that one of the plants has grown in a zigzag - up, then to the side, then up again. Their teacher, Ms. Mole, told them most plants only grow up, toward the sun. So, what could have happened to this one? By asking questions, making observations and drawing conclusions, lovable characters Elinor, Olive and Ari figure out that the pot was knocked over just before the weekend, so the plant had to change direction to keep growing up - mystery solved!