Offer the chicks millet spray and soft foods (like soaked or cooked grains) spread out on a flat surface. They will peck at it but at first they won't be very successful at actually eating it. But their skills will improve, and eventually they will be able to eat more difficult foods like loose seed and pellet. Once they have some skill at eating this way you can give them food in a bowl. Give them a shallow bowl of water that's big enough for them to get in it and splash around. They will learn to drink water this way.