Hi mix 1 or 2 tsp of ragi powder in 1/2 cup of water and mix well. Keep that on fire and cook, you can add milk at the end.

Keep water for boiling, take two spoon of ragi flour and add little water and make smooth paste, when water is boiling, add this paste and mix well till it cooks well and get thick, you can add dates syrup in it to taste good, if baby is 1 year u can add salt or bit of cow milk in it.