Hi Sarah, what about this one?

https://www.amazon.com/Cuentos-clasicos-infantiles-Spanish-Varios/dp/9687748168

Saludos.

I bought "Los Cinco y el tesoro de la isla" by Enid Blyton (ISBN 9 788426 142924) and also the English original (ISBN 978-0-340-68106-0) and tried to read it side-by-side but although written for kids age 8-14 I found it rather difficult yet.

I now use a magazine written in simple Spanish (from A2) and find it much easier as it is written for Spanish learners. It is called "Ecos" (95% is Spanish - 5% German - mostly short vocabulary lists, which you then would have to search yourself) - if you are interested I can send you one or two articles, to see if you like it - just send me your mail address via PM

¡Hola!

I haven't read (or more precisely, I can't remember the ones that my mom used to have in the house) any children book so I'm not qualified to recommend one :( but I found this site: http://www.cuentosinfantilescortos.net/cuentos-infantiles-destacados/

I like it! Most ot the stories are short and I have enjoyed many of them (even by their simplicity/innocence). Also, I saw that many of them are translated in English (there is a link right after the story ends), so maybe you can read a story in English first to completely understand it and then read it in Spanish with the background of knowing how the story goes.

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Also I found this site: https://es.wikisource.org/wiki/Cuentos_cl%C3%A1sicos_para_ni%C3%B1os

The stories are a little bit longer and the majority of them don't have pictures, but you might find some of them interesting.

¡Saludos!