Hamza discovers that a spinning triangle creates a cone shape, which has a circular base and sides that slope up to meet at a point, the apex. The Investigators take pictures of cone-shaped objects in the real world, and learn about the volume of a cone relative to a cylinder with the same height and base.  The challenge teams learn how megaphones can direct sound effectively to the human ear. The Brain Benders develop a strategy to calculate the number of two scoop combinations you can make with five flavours of icecream. A circular piece of paper can be used to create a cone shape.