'The Home Kindergarten Manual' proposes that children explore color by observing color nuances in the world around them and then experiment with color via a limited palette of paint colors. “The Way to Educate Is to Build on the Interests and Capabilities OF the Child, and Not Upon What We Think He Ought to Learn” - Forbush, W. B. (Ed.). (1921). 'The Home kindergarten manual'. New York: The University Society. https://archive.org/details/homekindergarten00univ/