Exploring Early Childhood
Child Development
Child Development through Literature
Frontiers in Psychology [http://www.frontiersin.org/Developmental_Psychology/researchtopics/An_Open_Book:_What_and_How_Young_Children_Learn_From_Picture_and_Story_Books/1579] has a fabulous collection of articles about picture books and their impact on readers, ranging from early childhood mathematics to gender analysis and how to read picture books aloud to develop a toddler's brainpower.
Picture books about emotions: [https://www.pinterest.com/audreynay/feelings-emotions-empathy/]
Picture books about emotions: [https://www.pinterest.com/audreynay/feelings-emotions-empathy/]