DIY Optical Kaleidoscope
Source: Stemoto Original
Explore the science of reflection! Kids build their own custom kaleidoscope using mirrored paper and a cardboard tube to create infinitely repeating, beautiful geometric patterns.
Categorisation
Props & Materials Required
- •Cardboard tube (paper towel roll)
- •Mirrored craft paper or reflective mylar
- •Clear plastic wrap
- •Wax paper or frosted plastic
- •Colorful translucent beads, sequins, or cut-up clear plastic
- •Tape and scissors
Step-by-Step Instructions
Fold the Mirrors
Cut a piece of mirrored paper so it is exactly as long as your cardboard tube. Fold it lengthwise into three equal sections (with the shiny side facing IN), forming a hollow triangle. Tape it so it holds its shape.
Insert the Prism
Slide the mirrored triangle into the cardboard tube. It should fit snugly. This is the optical heart of your kaleidoscope!
Create the Lens
Cover one end of the tube with clear plastic wrap and tape it down tightly. Push it in slightly to create a little 'bowl' shape.
Add the Jewels
Drop your colorful translucent beads and sequins into the plastic wrap bowl. Don't overfill it—they need room to tumble!
Seal and Look
Cover the bead bowl with a piece of frosted wax paper and tape it down (this lets light in but keeps the beads trapped). Hold the tube up to the light, look through the open end, and spin it!
Why It Works & Notes
This is a classic optics experiment. By angling three mirrors into a triangle shape inside the tube, light bounces back and forth repeatedly before reaching the eye. This multiple reflection creates the symmetrical, mandala-like patterns we see in a kaleidoscope.
Very safe project. The hardest part is folding the mirrored paper into a perfect triangle so it fits snugly inside the tube.