Rainbow Optics

Ages 5-8

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Learn about the spectrum of light, and see how the primary colors of light can be combined to create all the colors the human eye can see! Create a color-mixing light jar, project colorful shadows, and play with rainbow glasses for a colorful light game.

Everything needed, from materials to illustrated directions, is included, along with explore!, a bonus play & learn magazine with extra rainbow science projects and activities!


  • Create a color-mixing light jar
  • Build a projector and create colorful shadows
  • Play with rainbow glasses


  • Rainbow Science
  • Light & Shadows
  • Mixing Light

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24 reviews

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    Pharlain, Jul 1, 2020

    Lasting Fun

    My 5-year-old did this with her grandparents and has spent the next week doing shadow shows and explaining how shadows works to me.

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    tarnish158, Jun 21, 2020

    Great kit!

    Our 5yo LOVES this kit! It's hands down his favorite KiwiCo kit we've done over the years. He keeps going back to the colored shadow project - he's played with it everyday since we opened the box last week.

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    Ariel, May 28, 2020


    My daughter had a great time building the light. It was easier than we thought it would be. Plus she loves being able to make all sorts of different colors.

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    Meghan, Feb 2, 2020

    Out of the box projects

    Exploring colors is super fun! This crate was full of projects that I could have never imagined! Like he built a projector, that is so cool!

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    Amber, Jan 29, 2020

    loved it!

    My son loved this crate! He was very enthusiastic about it

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    Emma, Jan 20, 2020

    RGB is amazing!

    Building the projector was my daughter's favorite part. It allowed her to work on her engineering skills and also allowed her to work on her artistic skills. She loved seeing the color projected!

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    Hayley, Jan 11, 2020

    Let there be light!

    The overall theme of this project was interesting. Learning about the primary and secondary colors along with the spectrum of light was very interesting to my daughter who is actually very interested in art right now.

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    Justin, Nov 20, 2019

    Lessons on color and light

    My favorite part about this crate was being able to be creative but also learning about the science of color and light! My son played with it a lot even after he was done building it.

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    Anthony, Nov 15, 2019

    All projects were educational

    Who knew so much stuff could come out of that one box! There were so many different cool projects, between the light jar and projector, it was so cool! We had a blast making it.

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    Emily, Nov 1, 2019

    Resourceful learning

    STEAM education can be difficult to provide as a parent, however Kiwi Crate has been a life saver! Their information is resourceful and their projects are so hands-on. I loved this Rainbow Optics crate and am so happy we got it this month.

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    Jordan, Oct 29, 2019

    Colorful theme is cute

    Kiwi Crate has done it again! This crate focusing on color and light was not only educational, but such a fun activity for the whole family to take part in. Watching the different colors come to life made my daughter really happy.

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    Nick, Sep 27, 2019

    The light jar is awesome

    The color mixing light jar was a hit. He kept rotating it and having a blast watching all of the colors. There was so much information on colors and light in the magazine. It was a great learning experience.

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    Quinten, Aug 21, 2019

    Detailed and simple projects for the kiddo

    Due to the amount of projects, my son was a bit intimidated at this project at first. However, once he started, he found the directions to be really easy and the projects to be really exciting. His favorite was the projector.

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    Analisa, Aug 12, 2019

    Rainbow glasses were a hit.

    The Rainbow Optics Crate has definitely been my favorite so far. It was such a fun, colorful, and educational crate. My son loved playing with the games with the rainbow glasses!

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    Rebecca, Mar 4, 2019


    The rainbow box provided three fun and creative ways to learn about the color prism. The wipe off sheet kept my daughter busy for hours making different pictures to put in her light box. I loved that it sparked her creativity with the customizable designs and patterns for the mini lantern.

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    Carol, Jan 22, 2019

    Fun and colorful

    Every project helped build on my 5 year old's knowledge of primary and secondary colors. The kit was so easy to assemble and every step was thought out well. My son loved it, and further piqued his interest in light and color. The accompanying literature was helpful and interesting as well.

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    Denise, Dec 30, 2018

    Studying light

    My son absolutely loved the color glasses. He wandered around the house looking at all the different lights for hours, including the Christmas tree lights. I also loved the mixed color lights lantern because it was something he can keep and enjoy in his room as a mini night light.

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    Rachel, Jan 12, 2018

    Mostly good

    My daughter really liked making and playing with the projector. It was disappointing that neither of our red lights worked when we got it.

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    Jenny B., Aug 29, 2017

    nice experiments

    My daughter loved putting the viewer together and doing all the experiments with the bracelet in the sun. She also enjoyed coloring the sheets and watching them glow in the UV light. She was able to follow along with the directions to figure out how to put it all together.

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    Jessie S., Aug 24, 2017

    UV Light Fun!

    I loved that each piece had other activities to further my son's experience. It made the fun go farther than one project. We could enjoy doing multiple things which was great for him to really start understanding UV light. We really enjoyed the crate and I can say his favorite part was making the bracelet and having something he could wear and show off.

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    Kim T., Aug 24, 2017

    nice family activity

    We loved it. It was nice to sit down with our little girl to watch her and help her with her crate. We enjoy an evening of family time without being in front of the screen.

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    Bette B., Aug 19, 2017

    interesting, but little young for 4 year old

    I liked that my son was interested in making and using the ultraviolet light viewer. Some of the steps were too hard for my son to do on his own (opening and installing the brads) so I needed to help. He's only 4, so maybe that's why, but I would love for him to be able to complete it on his own.

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    Traci M., Aug 16, 2017

    Perfect for my grandson

    My grandson loved everything about the crate! He got bored when it came time to read all the info about UV lights but...I read it to him and he loved it. We still have some things to try from the materials but enjoyed doing the experiments and look forward to some crazy jello.

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    Kengning, May 25, 2017


    My daughter had a great time putting this together. She also learned a lot from the experience.

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