Class to class postcard or project exchange

I’m Olga, I teach schoolchildren English. In our course they have to do small projects 4 times a year, usually in the form of a poster or a PPT.
To spice things up and motivate my classes, I would like them to have an audience, so I got the following idea: we could send our project by snail mail or email, and your class would give us feedback. Of course, we would be glad to send along some postcards. You could send feedback in any appropriate form. If your curriculum includes projects like that, we could do the same for you.
Our next project will be in October, on the topics “Clothes for special occasions” (Pre-Intermediate English) and “My country and its flag” (Elementary English)

Would anyone be interested in such an exchange?