DS1 is a tall lad - 115 cm (which is almost height of an average 6 yr old) and he's just 4 yrs and 3 months.
When he runs he seems all over the place really - doesn't run with legs stretched, but with sort of knees bent the whole time (difficult to describe). Also bobs his head around a lot, which looks like it uses a lot of energy. DH says it's just because he's tall and has heavy, long limbs, but he does look rather strange compared to some of his smaller friends. Should I be worrying? What's 'normal' running for a 4 year old??