We have used paper bags from the shop, but if you do not have some you can make them.
You will need: A4 sheet of paper. Fold and glue the sheet as shown on the picture to make a “pocket” open from both sides.
Follwoing the instructions, you will make a small bag as on the picture.
Fold the bag in the top end and round the edges. Open it and fold tree of the cut pieces inside, leaving just one which will be used later on as the rucksack’s lid.
And finally, to transform this paper bag into a house you have to add roof, chimney and door.