Bring swim diapers for your baby. If you have a particular type of deodorant, shampoo, gel that you use bring extra with you. Regular tortilla chips are hard to find here, but it would be even harder for you to bring. Dr. Pepper much more expensive here ($1 USD a can). You are going to love this... Milk is $10-12 USD per gallon here. You are going to pay through the nose if you want to eat US beef here.
A possible helpful note: check the voltage for any electrical item you are bringing such as hair dryer, curling iron, etc. Check that it says 110-240V. You probably already know, but we are on 220V here. If it says that you can get cheap plug adapters and they work fine here. If not, don't bring. Although you can get voltage converters but they are rather cumbersome. My wife did not check and plugged in her $125USD hair straightener with just a plug adapter and burned it out.