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How to Make Glowing Rainbow Bouncy Balls at Home (2025 DIY Guide)

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Create your own glowing rainbow bouncy balls with this fun and science-packed DIY! Made with simple ingredients and glow-in-the-dark magic, these colorful balls are perfect for kids’ activities, parties, or just some good old messy fun under a blacklight.

Ingredients

  • 1/2 cup warm water
  • 1 tablespoon borax powder
  • 2 tablespoons cornstarch
  • 4 tablespoons white school glue (not clear)
  • Neon food coloring (pink, blue, green, yellow, purple)
  • 1/4 teaspoon glow-in-the-dark pigment powder per color
  • Disposable gloves (optional)
  • Blacklight
  • Small mixing bowls
  • Spoons
  • Old tablecloth or newspapers

Instructions

  1. Dissolve 1 tablespoon of borax in 1/2 cup of warm water. Stir well until fully dissolved. Set aside.
  2. In a separate bowl, mix 4 tablespoons of white glue, 2 tablespoons of cornstarch, a few drops of neon food coloring, and 1/4 teaspoon of glow pigment powder.
  3. Pour the glue mixture into the borax solution without stirring. Let sit for 15–20 seconds.
  4. Scoop out the blob with a spoon and roll it between your palms to shape it into a ball.
  5. If it’s sticky, dust your hands with a bit of cornstarch while rolling.
  6. Repeat the process for each color to create a full rainbow set of bouncy balls.
  7. Charge the finished balls under a lamp or use a blacklight to watch them glow like neon planets!

Notes

Measure everything ahead of time and prep your work area to avoid sticky chaos. Store finished bouncy balls in airtight containers to keep them from drying out. For best glow effect, use a blacklight!