(This is a long notes, so just pretend it's all bold I didn't want to kill your eyeballs <3)
Okay, you guys are going to be quite annoyed about this but it's important for the future of the story. In the beginning of the book, Sapnap, Halo, and George's ages (while kinda obscure) were aimed to be young-ish.
Then I introduced Dream who was a medical scientist and you can't be that young while being a professional but hey maybe he's just 1000iq or something. Then it got to the tree house, and I realised I wanted them to be more or less the same ages. So I am retconning the ages.
I know I know, its annoying when writers change things from the beginning of the story. But hey, I needed them to be older so...
I personally am a fan of lore and world building so any lore related questions you can put them here!
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Character ages:
Dream (21)
Sapnap (20)
George (21)
Tommy (16)
Wilbur (24)
Philza (32)
Ranboo (22)
Technoblade (26)
Niki (23)
Minx (22)
Soothouse members (23-27)
Halo (20)
Lia (39)
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Sincerely, The wizard under your staircase