What precautions are advised for a family travelling with a 4 yr old baby?

one of the first precautions will be to never leave the child alone, even for a minute. in a new place, you will have to be especially careful, as babies have a tendency to be very curious and may wander off without realizing. also, try and make sure that whatever you make your child eat is not too heavy as children often tend to fall sick while traveling, mainly due to change in the type of water and also the weather. other than that just carry all the basic medicines and your child's medical file in case something is required.