The "Usool ad-Deen" course has been put together by volunteer experts and teachers in the Mohammad (PBUH) Scientific and Cultural Foundation Center for Kids and Teens (Khaane Koodak va Nojavan in Farsi). This course is appropriate for children between the ages of 8 to 12. It aims to make students familiar with the basics of Shia Islam, including beliefs and doctrine.
The course was designed to be flexible based on the precise age of the students. While the core course objectives and learning outcomes remain the same, the teaching methods and structure can be adjusted to match each group of students learning capacity.
Finally, it is requested that the dear instructors remain faithful to the text of these lessons and refrain from adding or changing to it based on their style or personal knowledge. For example, when discussing Nubuwwah, do not get into criticisms of other faiths. Or when discussing Tawhid, please refrain from using examples to explain how God cannot be seen.
(https://www.amazon.com/Usool-ad-Deen-Religion-Children-Teachers/dp/B09CC84SSR)