The humor in the meme arises from a few factors:
1. **Juxtaposition**: The serious nature of a mathematical conjecture set against the casual and youthful demeanor of children creates a comedic contrast.
2. **Innocence**: Kids discussing complex topics like the "L-space conjecture" in a playful manner highlights their innocence and adds a layer of absurdity.
3. **Relatability**: For many, the image evokes nostalgia of youth curiosity, making it relatable and endearing.
4. **Expectation vs. Reality**: People might expect kids to discuss typical childhood topics, so seeing them delve into a sophisticated concept subverts expectations, leading to humor.
Overall, it's a blend of absurdity, innocence, and unexpected intellectual engagement that makes it funny.