A Child Knows Topology Before They Know 1, 2, 3
I find it endlessly fascinating that kids know that they can put their hand through a donut. They know a tunnel has a hole you can crawl through, or that two cups stuck together can still be taken apart. But in life, we teach kids numbers first and they learn topology only in college math - much later. Jean Piaget pointed this out in his book 'The Child's Conception of Space'.
Isn't that super interesting?