"Welcome to the Museum of Shapes. Alma is the curator of the museum. She decides which shapes should go where. Triangles have three sides and three angles. Can you help Alma find all the triangles on the shelf? Alma's favourite shape is a circle. All the points on the edge of a circle are the same distance from its centre. Not all shapes are geometric; some are wiggly and messy. Can you make a wiggly line with your body?" --