you have not mentioned the duration of the symptoms. If it is of recent duration and the discharge is clear and watery then just give some decongestant drops like Timic or Sinarest
Also steam inhalation will help relieve the stuffy nose and cough
. However, a greenish or yellowish discharge is suggestive of a supper added infection. In that case you should consult a Pediatrician
for appropriate treatment.
Thanks and best of luck.