Depends how small they are.
I give my newtlets bean weevils and micro crickets occasionally.
You can try giving them defrosted frozen bloodworm but I have found that newtlets like their food to move.
Maddie
thank you very much, the guy graham got them from said they will eat blood worms, but they dont seem to like them, but yesterday i fed them some baby baby baby mealworms, and they liekd them