Jana K.
Google
You can spend as much time here as in any souvenir shop, if not more, and it's even entertaining. Checking out all those postcards, magnets, writing letters...
You can send a Christmas postcard to your friends the whole year, including sending the postcard that will be delivered during the next Christmas. Or you can pay 8 Euro and send a letter from Santa to you or someone that you know, in a language that you choose from the offered ones.
The ladies working at the cash desk were super smiley and friendly.