3-4rd
uses a pincer grasp when holding a crayon or pencil
4-5th
Scribbles now take on recognizable forms
5-6th
Begins to scale the sizes of items more realistically
6-7th
combines several art activities to create one finished product（ex：body tracing can involve tracing，coloring，cutting，gluing，ect…
7-8th
Ground is at the bottom of the picture，sky is above.
Perception of the world
8-9th
Loss of interest in color,preferring to depict things in monochrome
9-12th
Able to handle complete compositiindependentl Matching independently,willing to try more material combinations
