hello sir my baby is 9 month old and he like to do just jumping but he is not sitting by himself. he is not crawling. what to do plz suggest

A. here you can follow your doctor advise and he will explain you in a proper manner after doing a proper assessment as it's important . So it's better to get the solution in a correct way . You can also consult online to a doctor for the same as a detailed discussion can be donefs .