How about Алан Александр Милн. Винни Пух и Все-Все-Все ?
My judgement - an extremely tough reading for a beginner. A rather... tackleable for an intermediate one. Though, I am not convinced that reading translations of English books. Cannot say I know Russian texts much simplier than that. As soon as the knowledge allows reading such texts (3000 words and good grasp of overall grammar, maybe) - well, the learner may try. There's no harm in that.
Thanks god Russian is not Japanese.
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