Simply made:
1. Carefully pull the lanterns apart and insert the plastic hanger.
2. Coat the lanterns with craft glue and place the pressed flowers and leaves on them.
3. After the glue has dried, press the light chain into the plastic hangers.
If you prefer more colour, you can decorate the lanterns with transparent paper.
Tear the paper into small pieces and stick them onto the lanterns with napkin glue. As soon as everything has dried, a second layer of napkin varnish can be applied as a protective layer. Then you can continue with the second point.