http://developmentalgym.com/homeInfants with joint hypermobility have joints that are able to bend further than usual and a trunk and limbs that appear to be floppy and weak. 

The increased range of  movement at the joints (sometimes called joint laxity or being double jointed) is due to differences in the connective tissue that forms the joint capsule and ligaments.

About 6-8 % of children appear to be developing in the usual way yet seem to have difficulties with coordination and with learning new skills which affects their function and participation at home, at school and in the playground. 

Developmental Coordination Disorder (DCD) is the internationally accepted name for this condition. 

About 15-20 percent of children are born with a temperament style that is very cautious and often quite fearful.  Elaine Aron coined the phase “highly sensitive child” for these children describing them as being very aware and quick to react to everything.  

There are a group of children who tend to walk on their toes some, if not all, of the time, despite there being no neurological or muscular condition that would commonly cause toe walking. 

The medical term for habitual toe walking is idiopathic toe walking. (Idiopathic = arising spontaneously or from an obscure or unknown cause)