What you need:
electric lantern stick
Cut the branches so that they are all equally long (about 8 to 12 in).
Tie four branches together in a right angle...
so that you get a rectangle.
Make another rectangle.
Connect the rectangles with each other with four more branches.
Now you have got a kind of cube.
Stick greaseproof paper (parchment) to the sides and the bottom of the cube.
Glue leaves (or other) onto the paper.
Tie a piece of string or wire to the upper rim of the lantern for hanging.