They don't stack in your backpack but I think you already know that. Now, If you put them on the floor, one on the another, they will build up into layers. I mean it will look just as if you put an item on a table - it will change its position. So, three pawns demons will build into a kind of a 'column' and that stack will look similar to 3 pawns put one on another :) Quite a cool combo for decoration.