Experimenters Harriet and Lucas visit Nina in her workshop and discover what happens when it rains on a pointy roof and a flat roof. Next, they go to a building site to see what makes pointy roofs so strong. Finally, they do an experiment that explains how roof tiles keep houses dry inside.

Originally released by BBC, 2015. Streaming video file encoded with permission for digital streaming by Infobase on January 17, 2017.

Meet the Neurons (0:55); --Why do Houses Have Pointy Roofs? (2:12); -- Senses Experiment (2:41); -- How Are Pointy Roofs Made? (2:45); -- Roofing Tile Experiment (3:00); -- Summary: Why do Houses Have Pointy Roofs? (0:39); -- Credits: Pointy Roofs—Nina & the Neurons: Get Building (1:56); .