Each child is an individual and grow at their own rate. At two years of age, here are the motor
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Developmental milestones record
Developmental reading disorder milestones (from Medline Plus):
"Physical and motor-skill markers:
* Should have the
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First-testosterone mc 16 teeth (can be a wide discrepancy)
* The height is roughly half the total height the child will attain as an adult
* May be psychologically ready for toilet training
* Can run with better coordination, while the stance may remain wide
* Can kick ball without losing balance
* Can build a tower of 6 to 7 cubes
* Can browse through a book one page at a time
* Able to turn a door knob
* Can pick up objects while standing without losing balance (often occurs by 15 months, and would be concerning if you don't see it by 2 years)"
http://www.nlm.nih.gov/medlineplus/ency/article/002012.htm
The amount of arm swing motion may be part of normal variation. I was not able to find a "correct" amount in the literature. If this is a concern, it can certainly be discussed with your pediatrician.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b
**Note: I'll be away until August 14th - The forums will re-open then.**