Christmas gift for teacher

Gift certificates are a little impersonal, but you really don't know these people. I would suggest gift certificates to maybe this great craft store in Place Jourdan http://becreativebyschleiper.com/plan.html

Or maybe to Dille and Kamille or Maison du Monde? Or for a cooking class at the Mmmh acadamy, classes there are great! http://www.mmmmh.be/