This is how the winter world is created:
Paint the outside of the suitcase with craft paint in blue-green and the inside in turquoise blue.
Cut the polystyrene plate with a cutter to the size of the lid and then glue it inside. Now cut the desired papers to the size of the styrofoam plate and the "back wall" and stick them on with double-sided adhesive tape.
Use hot glue to stick the fairy lights to the edge of the lid and the back wall.
Cut icebergs from the polystyrene sheet and stick them on with hot glue. Cover them with decorative snow. Cut out the animals from the paper and fix them in the snow.
Now glue on the scatter pieces and decorate with other paper motifs if required. Use a marker to write a text on the Christmas ball. Glue the ball into the winter landscape with hot glue.