Those are great!
I have always enjoyed children because of their innocent view of the world.
They will ask some really great questions... they don't have to make sense to an adult, but just realizing how odd and new the world is to them through their questions is worth hearing them ask.
I can't see telling children not to ask questions.
I do understand the desire to teach kids to be polite, but there are good ways to teach them to ask questions instead of instantly telling them to shut up.
I really wish the adults of our world would not be so quick to use the term "embarrassing" when aimed at children and their quest to understand this world.
I could care less if a child asked my why my nose was so big, or why I am wearing a skirt if I am a guy, etc.
I'm happy to see them explore their world.
I grew up when Art Linkletter, Bill Cosby, and Alan Funt were doing really cool shows with kids... asking questions, engaging them in conversation, and listening to the advice of these young people.
I wish we had more shows on television like those.
http://en.wikipedia.org/wiki/Kids_Say_the_Darndest_Things
[youtube]http://www.youtube.com/watch?v=KSz-Fm-66yE[/youtube]
Candid Kids Book
can't find any old 'Candid Kids' episodes on youtube for you to watch, sorry. 
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LIBRARIES... Hardware stores for the mind