My grandchild is now 61/2 and when she is barefoot she always walks around on her tip toes, out side of a short attention span and not seaming to being able to entertain herself, she is doing well in school (Kindergarten) learning to read and remember sight words and such, she has no trouble with behavior at school, but is very whiney at home(divorced parents). Should we be worried, is there are cause we should look into?