I think keeping i age appropriate is one thing, but feeding outright lies is another. Take for example the fact that we're told Columbus's journey proved the earth was round... you wanna talk complete and utter BS beng spoonfed to the kids...
The world was widely accepted as being round and not flat in Columbus's day and some 2000 years before Columbus as proven by the Greek philosopher Pythagoras, who mathmatically calculated a number of things about our planet, including it's shape. In addition, the Navigation used back in the day was BASED on a round world, and not a flat plane.
the reluctance in the govt of the time to hand over funding was based on the fact Columbus was, for lack of a better term, a tool, and everyone knew he was underestimating the size of the world, the duration of the trip, and the supplies/manpower involved in such an undertaking. He was also sloppy and passed off alot of guesswork as actual calculations.
Now, telling 5 year olds that "everyone in columbus's day thought the earth was flat, and columbus proved it was wrong" is sloppy education.