we are planning a trip to Europe in late October and it will be quite cold there. any special shopping we need to do for our 4 year old to keep safe in the weather?

yes it will be quite cold there, but i would suggest don't go overboard. you can buy the necessities such as woollens and warmers a few weeks before the trip, as children tend to outgrow clothes very fast. if you buy it now it may not be as good fitting as buying it then. go for warm leggings that your child can pair with shorts or with tops. thick socks, comfortable closed shoes, a pair of gloves just in case, warm caps that can be pulled over the ears, thick sweaters and jackets.

in addition to what Neeta said, just make sure to carry thermometer, and your baby's essential medicines that you use for fever, cold and cough. check with the doctor. these will help in case you have to take care of basic health issues but are not sure who to get in touch with while on vacation.