Board Thread:Ninjago Wiki News/@comment-25095204-20140703085642/@comment-30499831-20180507225645

AstraStars wrote: Warptoad wrote: AstraStars wrote: Warptoad wrote: They're close to 20, but can never be 20 or over it. Old/late teens, that's it, no more. https://www.youtube.com/watch?v=WxTS-I-0T3s ..that's a fan-made theory video. Creators have said they're teenagers, and that's it. They've specifically said they'll never be over 20. How about an actual official source:

https://twitter.com/TommyAndreasen/status/778145389862088704

Question: The ninja are most likely going to be ambiguously aged teens until the end of series, right?

'Tommy Andreasen, producer: I believe so. We want to keep them young and relatable.'

https://youtu.be/2kMWaHNh9Gw?t=13m35s

Dan Hageman, one of the writers: I wouldn't say 20, I would keep them all under 20.

Kevin Hageman, one of the writers: I don't think they'll ever hit their 20s.

https://twitter.com/brothershageman/status/909594849862492160

'HagemanBros Twitter: old enough. We never get into specifics because they should be eternal teenagers. The show wouldn't work so well if they had dad bods.'

A lot of fans prefer to ignore that because they think it's dumb. They're eternally teenagers, forever under 20.

And one more:

https://twitter.com/TommyAndreasen/status/965865583018471425

Tommy Andreasen: Old teenagers.

Being forever teenagers, they're still teenagers in Sons of Garmadon, and will still be in Season 9 when Wu is Teen Wu. The creators may have said that, but no one is forever a tennager, even fictional characters, and if your getting mad at me, try talkin' to the people who think colde is freaking 30 YEARS OLD! It's not like they're canonically immortal. They age, it's just that because of the magic of cartoon the show stays frozen in the timeline of the ninja's teenage years. They'll grow up eventually.. after the show ends

I'm not mad, just saying, that's just how it is. It'd make more sense if they were in their 20s now, especially considering the teacher thing. I understand why people think it's dumb.