Corbin is having a little trouble making the ramp with the marbleblock ramps, so Annie helps. She sees what piece and placement he needs. But as he continues to have trouble making the marbles roll as he wants, he shifts to a narrative about how the marbles “go to potty”, using the recess at the end of the ramp as the toilet. His shift to the narrative mode not only attracts Annie to play together with Corbin, but also helps Corbin discover new ways to make the marbles work, such as pushing them up the ramp all at once so the next marble can “go pee.”