It began with
Imaginary Games, applying Walton's concept of props that prescribe certain imaginings to
games, and then asking about the key props for videogames —
such as inventories, maps, and save
games, all of which condition the play of videogames in highly significant ways.
Because of the limited variability of these 2 items, a scale of mother - child activities was created summing the 6 items that loaded onto the second factor, corresponding to activities
such as reading, singing songs, telling stories, playing with toys, or playing
imaginary games.