Hi Banu,
You should be feeling great to have twins. Not many are gifted with twins!
I understand how hard it is to see kids not eating and sure no mother would like to let it go
My suggestion would be to make eating a sport...! That too with two kids you can easily achieve it.
Give them the food and allocate a time for them to finish it.
Tell them the one who finishes first will get an attractive gift. Introduce differnt kinds of food, so that they would start liking one or the other.
Make food attractive - like fill the bread sandwiches with varieties of butter and cheese, cut it in differnt shapes - diamond, heart, star, etc. draw on top of rotis funny faces with the ketchup and chutneys.
Include in their daily food with rice or roti, one type of colorful vegetable like carrot, betroot, beans, cauliflower, potatoes and tell a story for eating each of them. Eg: Rabbits eat carrot so they are able to run or hop faster.
Make them imagine the cauliflower florets as tiny trees and tell them eating lots of florets is like eating lots of trees and emptying a forest and make more of your own stories.
I always believe once we introduce different taste with the kids, they will then start liking it automatically. The challenge is introducing
Hope these tips are helpful! Good luck with your kids! Don't worry.