Shell Model

Famous quotes containing the words shell and/or model:

    There are no small number of people in this world who, solitary by nature,
    always try to go back into their shell like a hermit crab or a snail.
    Anton Pavlovich Chekhov (1860–1904)

    The playing adult steps sideward into another reality; the playing child advances forward to new stages of mastery....Child’s play is the infantile form of the human ability to deal with experience by creating model situations and to master reality by experiment and planning.
    Erik H. Erikson (20th century)