Going beyond pen pals...have you tried postal art. It's been a long time
since I have sent any postal art out but I assume it is still allowed. As
long as you pay first class postage and the item fits all of the requirements
of that class...plus occassionally a handling fee...you can send almost
anything through the mail. I sent wire sculptures and received teapots (real
teapot with beautiful flowers stuck in it) through the mail. These are sent
and arrive unwrapped, unboxed...etc thus the postal art title. I have made
large posters, etc. This can take pen pal experiences to the next level. I
am going to do this with my IS students this year (if still allowed) as a
project of communication and artistic expression with some of our neighboring
schools. Yes...I have sent things out of the country as well (Europe).