Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

General Chemistry Science Fair Project

Sparkling Rainbow Crystal

Sparkling Rainbow Crystal | Science Fair Projects | STEM Projects
Have you ever wanted to create your very own crystals? With just a few simple ingredients found at home, you can! In this experiment, you'll learn how to make Borax crystals that are perfect for decorating or just for fun!


The hypothesis is that when Borax is dissolved in hot water and cooled, crystals will form.

Method & Materials

To make a rainbow crystal, bend rainbow-colored pipe cleaners into a rainbow shape, dissolve Borax in hot water, and pour the solution into a bowl or container. Tie a string to a pencil and balance it on top of the bowl, then suspend the pipe cleaners in the solution. Wait 12-24 hours and observe as crystals grow on the pipe cleaners.
You will need Borax, warm water, string, pencil, colored pipe cleaners (red, orange, yellow, green, blue, purple), a large bowl, scissors, a cooking pot, and a tablespoon.


The crystals grew around the colored pipe cleaners and created beautiful, sparkly gems. The most interesting observation was that the crystals grew larger the longer they were left to sit in the solution.

Why do this project?

This science project is unique because it allows you to create your own beautiful crystals in any shape you bend the pipe cleaners into while learning about how solutions can form crystals.

Also Consider

Bend the pipe cleaner into different shapes to make different crystals (see videos for making gemstones and snowflakes!) Try adding food coloring to the solution to see how it affects the color of the crystals. Instead of using pipe cleaners, try using different materials such as feathers or leaves to create a different type of crystal.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
Create a large geode crystal using borax, food coloring, and a pipe cleaner!
Bring the winter wonderland indoors and make dazzling snowflake ornaments with just borax and pipe cleaners!
Share this Science Project:

Related Science Fair Project Ideas

Magic Milk Experiment
See colors magically move in milk with soap! This fun experiment demonstrates surface tension in a vivid way!
Geode Rock Borax Crystal
Make your own sparkling geode rock crystals at home with Borax and see science in action!
Baking Soda Invisible Ink
Write secret messages using baking soda invisible ink and reveal them with grape juice in this cool science project!
Share this Science Project: