In my opinion, not good at all. Firstly, completely confusing. On one page, it explains emotions with colors, on the other, it throws in an unrelated symbol. And where is the text?
"Why does Manos feel so bad? Most of the time, everything goes well!" (No answer).
"If dad doesn't want to take him to school, Manos gets angry." (Rightfully so)
The anger exercise is not applicable to 3-year-old children.