[frossie]

isn't 6 exactly the age kids start asking questions?

Yes but a 6 year old still believes their parents :-)

Seriously, the issue is that the questions young kids ask need a lot of context to interpret - they are not the kind of thing you can type at a search engine. For a (real) example a kindergartener watching a cartoon might ask "why are they walking normal"? So the parent has to figure out that (a) the cartoon characters are supposedly on Mars (b) the kid thinks Mars is like the moon (c) the kid has seen footage of real astronauts on the moon (d) ergo the kid had an expectation for the characters to walk "funny" on Mars.

The kid is asking a good question, but is not able to form the googlable question "What is the gravity on Mars"? It needs an adult (and frequently specifically a familiar caregiver) to mediate the question it is asking to the question that can be answered.