Don’t forget the pirate picture. So did he arrive in October of a particular year, around Haloween?
The 'at the zoo' image shows the age difference between supposed arrival in Hawaii and the 'pirate' image, in which he is obviously older. (That the 'at the zoo' image was a photograph taken in Hawaii appears to be an assumption, the location has not been identified that I am aware of.) The 'zoo' image appears to be closer in age to the toddler image than the tricycle image.