Microanalysis of Wittle Jim’s Missing Tooth
So, I was rewatching Treasure Planet today (again). And of course before we see our hero as a temperamental, law-breaking, leather-jacket-clad teenager, we meet him as this adorable little bundle of cuteness: 
Big-eyed, smiling, and gap-toothed. The image of childhood innocence (even if he is awake at least an hour past his bedtime so his disregard for rules has already kicked in ;) ).
But take a closer look at the tooth that is missing. Second to the right on the top row. From an artistic perspective this is a nice choice. Being off center, it is aesthetically pleasing. And of course, showing a kid with a missing tooth is a classic way to emphasize playful youthful innocence.
But from a science perspective, this is a rather odd tooth to choose. According to my research, the average age to loose that tooth is around eight to nine years old.
[For the curious, here is the source I used, a chart by the American Academy of Pediatric Dentistry: http://www.aapd.org/media/Policies_Guidelines/RS_DENTGrowthandDev.pdf (See exfoliation (falling out) of the maxillary (upper) lateral incisor (second from the front).)
Note: I have also seen sites that say that 7-8 is the average age to loose this tooth, but I can't find where they are getting their info and so I don’t know if it is a reputable source, so I'm going with this one. And it really doesn't matter anyway.]
There is no way this little mini-munchkin who looks like he's barely tall enough to reach his Mom's knees is eight years old:
(Also, if this mini-micro Jim is eight, then the rebellious "teenager" we know and love from the main story is actually twenty years old, post-12 Years Later time skip. Seems unlikely.)
This Jim is probably around eight years old, especially if the internet is correct in telling me that the artbook says that Jim's father left when he was eight:
Big difference.
Depending on whether you believe that Jim is fifteen or seventeen during the main adventure, our mini-micro-Jimbo is either three or five, and either way, that is very young for him to have lost that tooth naturally.
The more likely scenario would be that wittle mini-Jimbo managed to knock that tooth out.
Judging from Sarah's reaction when he jumps a couple feet (if that) from his headboard to his mattress:
And his complete disregard for gravity at any age:
My guess, though we are clearly diving into headcanon territory instead of just analysis, would be that he jumped off something too tall onto something too hard, knocked out a tooth, and then proceeded to gain absolutely zero respect for gravity from the experience.
In conclusion, Sarah really had her hands full raising Jim right from the start.
(Of course, we could have guessed that already.)














