Try to decorate the front of the boxes so when lined up they all coordinate with each other. The more magazines in the box, the stronger it becomes.
Large cereal boxes
White spray paint or acrylic paint
Light green acrylic paint
Dark green paint (try adding a little bit of red to green to make darker)
Small paint brush
Cut off top of cereal box. Halfway across top of box, cut at a 45 degree angle down to front of your magazine holder, cut straight across then back up other side at the same angle.
Lightly sandpaper outside of cereal box (they are usually shiny, coated paper)
Spray paint white, or paint on with inexpensive sponge brush. Let dry.
Cut leaf shape out of sponge.
Pour out small amount of green paints. Sponge paint green leaves on front of box leading to sides of box, first the darker for background leaves, then lighter for foreground leaves.
Use small paint brush to paint vines with darker green. Create vine by twisting paint brush.
If painting more than one box, try to connect vines on each box so when set together they will match.