Hi Kate,
You will love Costa Rica. It will be a wonderful sociology lesson for your kids.
It is a peaceful country with no standing army.
It is a country with an amazing commitment to ecology and the largest percentage of its total land mass devoted to national parks and preserves than any other country on earth. Wildlife is treasured, yet it is a country where neglected street dogs are a serious problem and cats are considered to be no better than rats.
Costa Ricans call themselves - Ticos. The universal greeting is "Pura Vida" which translates as Pure Life.
The upper class are predominately of European decent. The lower classes are predominately of local indigenous decent. There is a lot of class stratification.
San Jose is a city with one of the widest gulfs between the haves and have-nots in the western world.
You're best source of information, in my opinion, is the local English Language newspaper - "The Tico Times". You can get it online at
http://www.ticotimes.netWe have friends in the city. Their daughter (now aged 30) lived with us as an exchange student in high school.
If you go to my blog, the header photo is me zip-lining through the Santa Elana Cloud forest in Monteverde.
It has been a few years since we were there, but I'll dig out some of my old information and come up with some specific recommendations if you want.