You can give Robinia 30 , calc phos or Carbo veg on the basis of symptoms of acidity. But all these medicines will give your baby temporary relief .
You need to go for constitutional homoeopathy medicine for your baby, as constitutional homoeopathic medicine will not only solve acidity problem but also help your baby in boosting immunity and in many other ways will improve your baby's health.
Next Steps
Do consult online through practo
Health Tips
1) Give more of fibrous food and drink water as per needed for a 2 year baby.
2) Avoid giving packed foods like wafers, kurkure and chocolates, biscuits
3) Make sure your baby's digestion is proper.