Obviously all the same boy (except for the darker boy of course). The toddler next to the beach shack looks just around 2, give or take some weeks or so. And actually I don’t think he’s wearing diapers but underpants.
HA! Sharp eyes you have, they are underpants. So the next time we see him, he’s sitting on the fence and we believe that’s when SAD took him to the zoo. But where? Honolulu? Later, we see him at the beach with Stanley Armour.
But where did the dark boy go?