This is how you succeed with the autumn picture:
Print out the templates. Cut out the motifs and transfer them to the natural papers with a pencil. Cut out the motifs from the natural papers. Glue the mushrooms and pumpkins together with some craft glue.
You can use a Posca marker to add accents such as leaf veins etc.
Apply the window glue to the back of the motif with a painting sponge and then stick it to the window pane. If you no longer want the motif on the window, you can remove the adhesive from the glass with a damp cloth without leaving any residue.