When was the last time you received a thank you note? Heck, when was the last time you wrote one? It seems with the ease of electronic communication, the art of hand written notes is being lost.
Thank you for <item>.
Something about it. Ex: I like it very much. or I will use the money to buy the Spiderman toy I've been saving up for.
Hope to see you soon.
Of course this is very basic but it is a guide that I hope he will expand on. This will be something that I will continue to develop with my son.
Do you write thank you notes? If not, I hope this has inspired you to write one.