The Sorting Express (S01E27)

S01E01 Red S01E02 Blue S01E03 Yellow S01E04 Red Meets Blue S01E05 Yellow Meets Red and Blue S01E06 Green S01E07 Green Means Go S01E08 Chameleon S01E09 Silly Colouring S01E10 Orange S01E11 Red and Yellow Meet Orange S01E12 Purple S01E13 The Uncoloured Castle S01E14 Purple's Patterns S01E15 Rainbow S01E16 Little Red Riding Hood S01E17 Pick a Partner S01E18 Black and White S01E19 Shades of the Forest S01E20 Lighter and Darker S01E21 Pink S01E22 Brown S01E23 Many Mixes Make Brown S01E24 The Printing Crew S01E25 Grey S01E26 Return of the Printing Crew S01E27 The Sorting Express S01E28 Choosing Colours S01E29 Colour Wheels S01E30 It's a Colourful World