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Glowing Invisible Ink Eggs

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A calming craft project that combines creativity and science to create beautiful glowing invisible ink eggs.

Ingredients

  • Empty eggshells (blown out or carefully emptied)
  • Tonic water or diluted highlighter ink solution
  • Small black light or UV flashlight
  • Cotton swabs and fine paintbrushes
  • Paper towels
  • Shallow tray
  • Small needle or pin
  • Skewer
  • Warm soapy water
  • Clear acrylic spray or diluted PVA glue (optional)
  • Gloves and apron (optional)
  • Small padded box or egg carton for storage

Instructions

  1. Prepare the shells by tapping a pin into the top and bottom of the egg to make holes.
  2. Blow out the contents into a bowl, rinse shells, and let them dry on a towel.
  3. Coat the inside with diluted PVA glue or clear acrylic spray for stability and let it dry.
  4. Lay a soft towel on a table and arrange shells.
  5. Pour tonic water into a dish or dilute highlighter ink.
  6. Test with a cotton swab on scrap paper to check the glow.
  7. Practice writing small shapes to assess stroke pressure.
  8. Dip a fine brush or cotton swab into the glowing solution.
  9. Paint words, dots, or patterns on the shells with steady strokes.
  10. Let the ink dry fully on the shells.
  11. Turn on your black light in a dim room to reveal the glow.
  12. Seal with clear acrylic or diluted PVA glue if desired.
  13. Store the finished eggs in a padded display or egg carton.

Notes

Use tonic water for a gentle glow. Highlighter ink can be used but may stain. Always supervise children when crafting.