To put a space-age spin on a centuries-old tradition, make glow-in-the-dark eggs for your annual springtime egg hunt. Although kids of any age have fun searching for hidden eggs, a glow-in-the-dark egg hunt is especially fun for older kids and teens. Hide the eggs in the dark of night, either inside or outdoors. Be creative because the glowing eggs are difficult to hide and easy to spot.
Place clean, uncracked eggs in a large saucepan. Arrange the eggs in a single layer to prevent breakage. Fill the saucepan with enough water to cover the eggs plus about 1 inch.
Cover the saucepan, then place the pan on a burner turned to high. Remove the saucepan from the burner about four minutes after the water begins to boil.
Let the eggs sit in the covered saucepan for about 12 minutes for medium-sized eggs. Allow 15 minutes for large eggs and up to 18 minutes for extra large eggs.
Transfer the saucepan to a sink. Drain the water and fill the pan with cold water. Allow the eggs to remain in the cold water until they are completely cool.
Remove the eggs from the water and place them on a layer of paper towels to dry. Store the eggs in the refrigerator immediately if you aren't ready to dye them.
Fill a cup or bowl with hot water, white vinegar and a fluorescent or glow-in-the-dark egg dye tablet. As a general rule, use one dye tablet and 3 tablespoons of vinegar for each 1 cup of water. If you're using liquid egg dye, use approximately 10 drops of dye and 1 teaspoon of vinegar for every 1 to 2 cups of hot water. Double the amount of dye for more vibrant color.
Place the boiled eggs on a spoon and dip the eggs carefully into the dye mixture. Leave the eggs in the mixture for at least five minutes, turning them occasionally for even color. Additional time in the solution creates more intense color.
Remove the eggs from the dye mixture. Allow them to dry on a layer of paper towels, then place them in the refrigerator until it's time to hide them.