Free Your Mind: A Bicycle Colouring Book by Sustrans volunteer Polly contains designs and quotes to both inspire and amuse. The bicycle theme runs throughout the book. Country scenes and bicycle mandala's, folding bikes and a pedal powered windmill all await you. This is the first of Polly's bicycle themed colouring books born out of her time with a broken leg and a wish to one day cycle again. 17 wonderful designs and quotes to free your mind.