Inflate the balloons to the desired size of your lanterns and tie them off securely.
Cover the balloons with plastic wrap to prevent the doilies from sticking to them permanently.
In a bowl, mix equal parts fabric stiffener or white glue with water to create a thin paste.
Submerge a lace doily in the glue mixture, ensuring it is fully saturated.
Carefully drape the saturated doily over the top of the balloon, smoothing out any wrinkles and ensuring it conforms to the shape of the balloon.
Use clothespins or clips to hold the doily in place if necessary.
Repeat the process with additional doilies, slightly overlapping them to cover the entire surface of the balloon.
Allow the doilies to dry completely, which may take 24 to 48 hours depending on humidity.
Once dry, gently pop the balloon and remove it, leaving the hardened doily shell intact.
Trim any excess doily edges with scissors to create a neat finish.
Insert an LED tea light or a small bundle of fairy lights inside the doily lantern.
Hang the lantern using string or twine, or place it on a flat surface to display.

Variations & Tips
For a personalized touch, consider dyeing the doilies in different colors before starting the project. This can add a pop of color to your lanterns and match your existing decor. You can also experiment with different sizes and shapes of doilies to create a variety of lantern designs. For an outdoor setting, consider using waterproof fabric stiffener to ensure the lanterns withstand the elements. Additionally, adding embellishments such as beads or small charms to the doilies before stiffening them can enhance their decorative appeal.