Casually making up two languages, both written/verbal languages, for one of the important races in your fantasy story, teasing the audience with words from them and then wanting to stop and writing and start developing the actual language…
There’ll be things you never asked her
Oh how they tear at you now
By about the age of 11, children develop something known as Hypothetico-deductive reasoning, as part of early cognitive development. Basically, children make a hypothesis about something, they predict what will happen, usually based on past experiences of theirs, and then they’ll test out how accurate they were in their predictions by seeing what happens.
Obviously, this lacks the rigours of true scientific inquiry, but the curiosity and the procedure is much the same; they make guesses about something, then test to see if they were right, based on the evidence of what they observe.
It has been said before that religion gives the answer to the question before they even ask the question: <insert deity or holy object of worship here> did it, he/she/it can do everything at once all the time no matter what. Indoctrinating a child in religion, telling them that the god or deity their parent’s believe in can do anything, means that there is the danger that in their hypothetico-deductive reasoning they arrive at the conclusion of ‘God’, perhaps if there is a problem with their reasoning, or they get stuck. Once they fall back on that, and receive further indoctrination, they’ll fall into a vicious circle of using god or religion as the answer, when it is not.