ETGTOYS' educational puzzles, games, and developmental cards are developed and produced by HEADU from Italy. HEADU's products are based on the research of Howard Gardner, Professor of Cognitive Sciences and Educational Psychology at Harvard University. He developed the Theory of Multiple Intelligences, believing that there is not one single intelligence but that each person has multiple ways of thinking at birth that is mostly independent of one another. Biologically present in each individual, although in different ways, each unique intelligence develops within a favorable cultural context. His studies recognize the following intelligence types: * Personal * Linguistic * Musical * Bodily-Kinesthetic * Spatial * Logic-Mathematic * Naturalistic Each of our award-winning products identifies the intelligence type that the item targets for development.