Travelling trips

Take some rice and dal seperately wash it allow it to dry completely after washing it then add some ghee in a pan roast that dal and rice and gring it in a mixer to conver it in powder so that u can pack it a container and take it with u .and whenevr u require to feed ur baby mix it with some warm milk .

Apart from what's suggested here, you may carry cerelac and you get things like curd, fruits and even mashed potatoes everywhere so that's also easy to feed. Since you will easily get dosa and idli so you may feed mashed potatoes and mashed idli in curd to your kid. You can carry a dry version of whatever you kid eats.

The temperature is too humid in tamil nadu and during summer childrens often suffer from diarrhea or vomiting especially when u r changing the cities so the best part is to have curd and rice and apart from these banana is the best which will be easily available.