What I'm thinking right now is exchanging video messages, posters (on their favorites or schools) or short stories but these are just ideas.
Please let me know if you are interested in and we can discuss this in detail!
I am in Jakarta and I have tried to do some live shared online classes in the past, but scheduling was always a problem. When my students were available, the other classes were not. It's a great idea, and very beneficial for both teachers and students.
I have ideas on how to try to get around this, but for (my) young students living in Jakarta it's virtually impossible to do this unless the other class is in Malaysia, Singapore, Indonesia, or Vietnam, for example. (There are so many technical problems here in Jakarta, plus anything after school is virtually impossible because of the horrendous traffic problems.) Unfortunately, my (potential) partner schools were many time zones away.
I commend you for your interest in this project, and I wish you success. I wish my students could have benefited from this. Hopefully, next year with changes in my school they will!