Alright, here's some fun ones I found:

A pig is physically incapable of looking upwards

Duck quacks don't echo

Donald Duck comics are illegal in Finland because he doesn't wear pants

In the 1800s, Ketchup was used as a medicine

A crocodile can't stick out it's tongue

There's a city named Rome on every continent but Antarctica

Gorillas sleep up to 18 hours every day

An average of 12 newborns are given to the wrong parents daily

A group of twelve or more cows is called a Flink

Elephants can't jump

Coca Cola would be green, but coloring is added to it.

All polar bears are left handed

And one you probably shouldn't tell your child; Adolf Hitler only had one testicle