Post Crossing is fabulous; it's simple and delightful - send a postcard to another human being and receive a postcard from another human being.
If you're looking for learning opportunities there are plenty: stamps, handwriting styles, addresses, geography, language, postal service, titbits of cultural information from far flung places.
We just love it because it makes us happy and it has a lovely literacy leaning.
Our fridge is covered in colourful postcards from all corners of the world.
