Hi I am Kabuto. I am Japanse..
How about Japanese old tales? They are for children so it is not so difficult for even beginners of Japanese.
We learn (or enjoy) it in kindergarten, therefore it is like a common knowledge for us.
Here is the example of them; Momotarou, KachiKachi yama, Shitakiri Suzume
I hope it helps you.
Kabuto