My daughter is having cough, cold and blocking chest, recommend me some home remedies for her. She is 2.8 years old

Heat coconut oil and mix kamput in it.. after making mixture of it, let it cool down and use it daily any time (afterbath, before sleep) Rub it on whole body mainly on chest and back and u can use it whole year... dont have any side effects it helps to prevent cough... Iam using this from last two months it helps alot to my child from cough..