You need:

• Cut plaster strips approximately 3 cm x 30 cm (about 5 per jar).
• Fill a bowl with water and immerse the plaster strips in it.
• Place the wet strips on the jar from top to bottom.
• Allow the plaster strips to dry for a few hours.
• Once the strips are dry, apply phosphorescent paint on them.
  Tip: For even more phosphorescence, apply a second layer of paint.
• Cut out the eyes from the black adhesive foam sheet and stick them on the jar.
• Draw the Frankenstein's mouth with a black paint marker.
• Decorate the top of the jar with Halloween sequins and spiderweb fabric.
• Turn off the lights to admire the result in the dark!