Get the kids excited, with a letter through the post from Santa, the envelope has a lapland postage stamp, 

you write the name of the child at the top of the letter & on the envelope, name & address 

See there little faces light when they see they have a letter from Santa himself 

£2 plus P&P 

​https://crafty-chez.sumupstore.com/product/letter-to-and-from-santa