Family with two young kids moving to Guate. (Guatemala City)

Hello, My husband and I are moving to Guatemala City in April to work with an NGO for 5 years. We will arrive with a 2.5 year old and a 9 month old. We have housing already arranged, but I have no idea where to start packing. I don't what's available or what I should bring.

So, my questions to fellow expats:

-Is there anything you wish you had in Guatemala that isn't available there?
-What do you wish you knew before you arrived in Guatemala?
-For parents, what kind of baby items are available, or not available?

Any other tips or advice about moving to Guatemala City would be greatly appreciated. Thanks!!