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What is A normally developing 10 months old child should be able to do all of the following except – and explain in detail?
A child starts trying to build a tower of cubes (2 cubes) by the age of 1 year.

About other options

Child can stand with support by 9 months.
Child can play peak-a-boo game by 10 months.
Child can pick up a pellet with thumb and index finger (pincer grasp) by 9 months.