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the 2-year-old baby is an important period for exercising big movements and growing muscles. at this time, children can train big movement muscles by carrying, stacking dismantling building blocks. the sound made by the contact of building blocks and other objects, as well as the sensory experience of holding the building blocks, can effectively promote children's cognitive development. some children play with building blocks for several hours, the environment will not affect them. i guess that children have already possessed the basic elements of success - persistence and patience..syi