Why not have a go at writing your own informal letter at home.
This could be a thank you letter, a post card or just a letter telling someone why they or special. At the moment it is not easy to see each other or spend lots of time together and it is most definitely a great surprise when exciting post gets delivered!
Remember to include all the features of an informal letter and don't forget to use your best handwriting too.
You never know, you might get a letter back!