Color-Mixing LED Crystal

Ages 9-16+

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Make a color-mixing LED crystal and explore the physics of color!

Includes a step-by-step video tutorial link, illustrated blueprint instructions, all the materials, and a special-edition Tinker Zine magazine for more project fun!


  • Prepare the base
  • Wire the circuit
  • Mix the colors
  • Calibrate the crystal
  • Experiment with light
  • DIY Conductivity Probe
  • DIY Resistor Twister
  • "Illuminating LEDs" Tinker Zine magazine


  • Electricity
  • Circuits
  • Colors and Light

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6 reviews

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    Esther L., May 8, 2018

    Kids learned some basics of electricity: flow, open and closed circuits, and resistance.

    It was a nice visual project that allowed the kids to learn some basics of electricity: flow, open and closed circuits, and resistance. It also allowed me to introduce them to RGB and I was able to show them pixels in an old TV and show them how three colors made up the entire picture they see. It also illustrated the RGB color settings that they have seen in some art programs on their laptops. Before it really had little meaning other than random numbers that changed the color. Now they have a firm understanding of what is happening there.

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    Sunita H. , Feb 27, 2018

    Son was excited to use wires and electricity to build the crate.

    It was simple enough that he could do most of it by himself, but did it with his dad to make sure it was right. This is one he was proud of when he made it and even took it to show and tell at school and called his Grandma on Skype to show it off. Something about making things with wire and electricity really got him excited and he was proud that he was able to do it.

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    Leslie R., Dec 10, 2017

    Granddaughter loved the construction process and combining the different colors.

    the granddaughter loved the process of construction and combining the different colors to learn about what makes white light. she was extremely proud of the finished product, as well.

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