Across The Spider-Verse had a 14-year-old kid on the animation team
Preston Mutanga caught the attention of Across The Spider-Verse producers Chris Miller and Phil Lord with his LEGO trailer

Preston Mutanga is living a Doogie Howser-esque dream. The 14-year-old is among the animators of the new film Across The Spider-Verse—specifically (spoiler alert!) the dimension-hopping sequence that takes place in a LEGO universe. Mutanga worked on his part of the film during spring break and after finishing his homework on school nights, consulting with producer Christopher Miller every other week, according to a new New York Times profile.
“[Yes], I animated a part for #AcrossTheSpiderVerse!” Mutanga confirmed on his Twitter in the wake of the NYT piece. “[It] was honestly such an amazing journey and working with @philiplord, @chrizmillr, @CSteinberg9, and the rest of the spider-verse team was a dream come true. you guys absolutely ROCK.”