I have 2 kids. Everyone I've spoke to who has 3 or more has said that the jump from 2 to 3 is as big as the jump from 0 to 1.
I have 2 kids. Everyone I've spoke to who has 3 or more has said that the jump from 2 to 3 is as big as the jump from 0 to 1.
But note that the question is not if 3 kids are harder. They're obviously harder than 2.
The question is (for the sake of the analogy), if going from 2 to 3 is harder than going from 1 to 2 or 0 to 1.
We are talking strictly about incremental difficulty here.
Without providing any hard research to back my thoughts, I'd also surmise that it is difficult to transfer this onto the difficulty of learning a language. My thinking on this is that if for example you are learning another language within the same family, that is a different level of difficulty than learning a language in a new-to-you language family. As a German speaker, there are other Germanic languages that look very familiar to me, where I could take a reasonable guess at the meaning. On the other hand if I were to learn Mandarin or Russian, it would be a significantly larger task.
But all pretense of democratic rule must be jettisoned once the kids outnumber the parents.
From 2 to >2 was the biggest hurdle and the reason is simple: you have 2 hands with which you can totally control 2 kids. With >2 you need to master a different technic to control (read: keep 'm safe) under the most unexpected circumstances.
Edit: and we speak 2 native languages, our kids have grownup in 2 different countries. Sofar they pick up languages pretty easy and I attribute that mainly to not being afraid to learn & make mistakes.