Osmosis Jones (2001) has been considered a Timeless Classic because it is a kid-friendly urban movie disguised as an educational one with the non-human body scenes in live-action and the human body scenes in animation.
While it is somewhat compared to another Timeless Classic, Inside Out (2015), Osmosis Jones (2001) is more realistic because it focuses on the human body rather than just emotions.
Inside the body of Frank DeTorre (Bill Murray) or the city of Frank, a white blood cell cop Osmosis Jones (Chris Rock) teams up with a cold pill named Drix (David Hyde Pierce) to stop a contagious virus (Laurence Fishburne) from infecting the city.
If this was the city of Christian, Coughia would get arrested by the white blood cells.
The point is, Osmosis Jones (2001) will help children to get their science and anatomy work done with this Timeless Classic.