Below is the Chinese textbook for the first grade students in China: http://blog.sina.com.cn/s/blog_8d0595850100xcko.html

Some books for 4-6 years are written in Pinyin, some books for about 4-9 years are in both, line to line parallel, syllable to syllable matching. --- By the way, for the present period, you might as well give the English version of your questions under the Chinese version ( Italian speakers or learners in China are much fewer than English), that will make you clearer.

有的呀，买少儿读物，就有拼音的。