this is taken from hughes
first ed was in 1991, so try out whatever that works for you. don't take it as a guideline, just informal reading lor.
6-12 mths - colourful picture books, stacking toys, nesting toys, sponges for water play, mirrors, toy telephones with dials that move, toys that react to the child's activity.
age: 4-8 mths
intellectual characteristics: interest in the effects of one's actions on the external world
type of play: child repeats behaviors such as crumpling a piece of paper or banging on the table, that has a satisfying effect on the environment.
age: 8-12 mths
intellectual characteristics: appearances of intentional, goal directed activity e.g. when a child pushes aside a pillow in order to get the toy that is placed behind it
type of play: goal directed infant often abandons the end in order to play with the means. the act of pushing aside the pillow becomes a joyful game and child forgets about hidden toy.
ref: piaget's stages and characteristics of sensorimotor play
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here's something that talks about tactile objects
research has found that younger babies engaged in alot of mouthing, looking and passing things from one hand to the other. by way of contrast, older babies tend to run hteir fingers across the surfaces of objects they know how to change their pattern of manipulation to accomodate the object in hand. when an object is followed by another that differed in textured, babies did alot of fingering. if successive objects differed in shape, babies would rotate them in their hands and pass them from hand to hand, looking at them from different angles.
hughes, 1991, pg 54 - 55 (children, play and dvpt)