So a few points I don't see discussed often or at all:
Are teeth turning gray a possible sign of aging? If so, is this a warning to the child/Yellow of growing up? A quick google search of "aging gray teeth" says yes, it is sometimes a sign of aging.
When Yellow/child chooses green as his favorite creative color, the Notepad rejects this answer. It's notable to point out that Green/elder's color is, of course, green. Is this also the Notepad's way of warning the child of growing older? It is also the color of the area for logic and reason in the brain, something you develop as you grow.
In the second episode, on a board full of numbers, there's a swastika that is equaled to the theory of relativity. I've seen people mention this without much explanation. In the kickstarter video, the kidnapper is wearing a Nazi armband AND a Jewish hat. The developer of the theory of relativity is, of course, German-born Jewish scientist Albert Einstein. The year he died was also 1955.
"I'm friends with my dad." Yellow maybe knows more then he lets on. If Yellow is a child, he could be just following his father's lead and not actually the villain. In Episode 2, while both Red and Green are wired to the future computer, we see Yellow along with his father wearing tin-foil hats. These hats are often linked to conspiracy theorists and paranoid individuals. Could the kidnapper, Roy, be a holocaust denier? Is this why Nazism and Judaism are linked, and perhaps, equaled? In the picture on the fridge where Red seemingly disappears from the table and instead is looking in on his friends, Yellow has a smile on his face. Though many people interpret this smile as innocence of the situation, I believe the positions of his eyebrows in these pictures show more a deviant expression than what an innocent smile would be.
The clown painting and the possible episode 6 birthday party could be linked. The clown painting makes several appearances throughout the episodes, as do mentions of parties and confetti imagery. This could be a huge stretch but Roy Brown was a famous clown, puppeteer and television personality. But even if Roy Brown isn't connected in anyway, a clown character at the birthday party isn't that much of a stretch.
