How to cure chest congestion for kids

Hi everyone I think coming winter months will be very difficult  with kids they get cold and cough easily so I can with home remedy using onion I knew everyone think what?using onion yes let get started,
Needed,
  Onion 1
 Coconut oil  2 tbs
•Breakup chest congestion- Crush an onion within coconut oil. Coat the chest with onion paste and cover the chest with a dish towel then a shirt.leave it for  30 minutes for small kids  and older people u can leave for overnight .
Pls try this and post comments below.