Beautiful babies :heart:
You will want to get a good quality lab block (Harlan tech 2014, oxbow regal rat, or Living world hamster extrusian) as that is 80% of the diet.
The other 20% is daily veg and healthy treats like a piece of fruit, cherrio, piece of boiled egg, piece of cooked cereal, etc
With babies that young, you might want to give them a saucer of soy infant formula (grocery store) thickened with baby cereal a couple of times a day.