Here's a letter my 5 year old son Nayan wrote (actually my wife took dictation) to his friend from Oaxaca:
We are in Mexico and its really hot where we are and Issey there are cactuses growing they are really cool because they have prickles on them and they are really big cactuses bigger than people and and white stuff comes on them that makes them smaller I think its some kind of bug that eats the cactus the white stuff I`ve seen on big cactuses each day I look and the cactus gets smaller and smaller. Issey there is a museum of sea turtles and they are really big. One turtle can lay 100 eggs. Its like India here because you don`t have to wear seat belts.
Issey its really hot. The ocean water is really warm and there are waves at the beach. Really big ones and really strong. Big and strong enough for people to go surfing. People can do snorkling here and my dad is snorkling right now. They speak Spanish here and a lot of Italian! The roofs of the houses are made of palm leaves, the houses are open -- they have no doors or walls, there's no glass for the windows just wood that opens all the way up. And there is no hot water but you don´t need it because its really hot.