“…This line of intervention has its theoretical basis in the conclusions of studies on children's play, which have confirmed that play, the childhood activity par excellence, is vital and indispensable for human development. Research on the contribution of play to child development has confirmed its important role in intellectual development (Bruner, 1986;Dansky, 1980aDansky, , 1980bDockett, 1998;Fisher, 1992;Garaigordobil, 1992Garaigordobil, , 1995aGaraigordobil, , 1995bGaraigordobil, , 1995cGaraigordobil, , 1996bGaraigordobil, , 2003aGaraigordobil, , 2003bLevy, Wolfgang, & Koorland, 1992;Marbach & Yawkey, 1980;McCune-Nicolich, 1981;Piaget, 1945Piaget, /1979Price-Coffee, 1995;Saltz, Dixon, & Johnson, 1977;Udwin, 1983;Vedeler, 1997;Vygotsky, 1933Vygotsky, /1982Yawkey, 1986). A pioneering work was that of Saltz et al (1977), who found that fantasy activities produced an increase in IQ, in the ability to distinguish fantasy from reality, and in language.…”