Once upon a
time there were two friends: a little monkey and a green crocodile. They were
the best friends and they used to have a lot of adventures. But once, a little
monkey got into a trap set by the evil people. Monkey didn’t know what to do,
so she started to scream. The green crocodile have heard his friend screaming
and saved a little monkey with its strong teeth. After that, they became very
cautious. The end.
Не знаю, можно попроще написать, или побольше. Решайте сами.