Pongo by Jesse Hodgson

From chapters.ca:
Pongo is a masterful debut by talented illustrator and author Jesse Hodgson. Pongo traces his way from the rain forest floor to the treetops on his search for the bright orange sun. On the journey up the canopy he encounters different jungle creatures, all diverting his attention from the real thing - a curled up orange snake, an orange honey-soaked bee hive, even a baboon's bottom! - each distraction a fun surprise for any young reader. Hodgson's beautiful illustrations are reminiscent of Henri Rousseau's paintings, drawing you into the depths of an enchanting, limitless jungle that will capture every child'
s imagination.