Create a cardboard camera
Build a working cardboard camera with a simple pinhole, lens, shutter, and viewfinder; decorate and test it to learn about light and photography.
About this activity
Build a working cardboard camera with a simple pinhole, lens, shutter, and viewfinder; decorate and test it to learn about light and photography.
What you need
Step by step
- 1
Step 1
Gather all the materials and put them on a clear table so everything is ready.
- 2
Step 2
Choose a sturdy cardboard box and tape all open seams closed to make it light-tight.
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Step 3
Paint or line the inside of the box with black paint or black paper and let it dry to stop inside reflections.
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Step 4
On one side mark the center and cut a round hole about 2.5 cm wide for the lens opening.
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Step 5
Make a pinhole plate by wrapping a small cardboard square with aluminium foil and poking one tiny hole in the center with the needle.
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Step 6
Tape the magnifying glass or small lens over the round hole with the curved side facing out so the lens is centered.
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Step 7
Place and tape the pinhole plate over the lens hole when you want to use the pinhole option so you can switch modes.
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Step 8
Cut a small rectangular flap of cardboard and tape one long edge above the lens hole so the flap can swing as a sliding shutter.
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Step 9
Make a simple viewfinder by cutting a small peephole on the top of the box above the lens position and taping a short paper tube or folded cardboard over it.
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Step 10
Cut a window in the back of the box and tape tracing paper or wax paper over it to make a translucent viewing screen.
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Step 11
Seal any gaps or shiny spots inside with tape so no stray light leaks into the box.
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Step 12
Decorate the outside of your camera with colouring materials stickers or markers to make it uniquely yours.
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Step 13
In a dim room point the camera at a bright scene and open the shutter briefly while looking at the back screen to see the upside-down image.
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Step 14
Move the back screen or slightly shift the lens position to adjust focus until the image on the screen looks sharp.
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Step 15
Share a photo or video of your finished cardboard camera and what you learned on DIY.org.
Fun facts
How do you make a working cardboard camera with a pinhole, lens, shutter, and viewfinder?
Start with a small cardboard box and paint the inside matte black to reduce reflections. Cut a small round hole for the lens and a separate tiny hole in foil for the pinhole. Mount a small convex lens over the larger hole, tape a foil pinhole behind it for sharper images, and make a sliding cardstock shutter. Add a translucent paper screen or viewfinder tube inside to see the projected image. Decorate the outside and test by pointing at a bright scene; adjust the lens distance for focus.
What materials do I need to build a cardboard pinhole camera?
You’ll need a small sturdy cardboard box (shoe box), black paint or black paper, aluminum foil, a pin or sewing needle for the pinhole, a small convex lens or magnifying glass, scissors and tape or glue, cardstock for a sliding shutter, tracing paper or wax paper for a viewing screen, ruler and pencil, and decorations like markers or stickers. Adult supervision is needed for cutting and making the pinhole; a craft knife should be handled by an adult.
What ages is a cardboard camera project suitable for?
This project suits ages 7–12 for most steps with adult help for cutting the pinhole and using knives. Younger children (4–6) can join in decorating, taping, and testing but need hands-on supervision. Teens can experiment with different lens positions, shutter designs, or camera sizes for deeper learning. Always supervise tool use, and adapt complexity: pre-cut parts for younger kids and add measurement tasks for older children.
What are the benefits of building a cardboard camera for kids?
Building a cardboard camera teaches basic optics—how light creates images—alongside problem-solving, measurement, and patience. Kids practice fine motor skills when cutting, folding, and making a pinhole, and develop creativity decorating and modifying the camera. Testing and adjusting focus introduces scientific thinking: form hypothesis, test, observe, and iterate. It’s a low-cost hands-on way to spark interest in photography, physics, and engineering, perfect for school projects or family STE
Watch & Learn
Need help?
What can I substitute if I can't find a magnifying glass, black paint, aluminium foil, or tracing paper?
Use a lens salvaged from old binoculars or a webcam module instead of the magnifying glass, line the inside with black construction paper if you don't have black paint, use the thin metal from a disposable baking tray for the pinhole plate in place of aluminium foil, and tape wax paper over the back window instead of tracing paper.
The image is blurry or too dim — what should I check and fix?
Check that all box seams and shiny spots are sealed with tape and the interior is fully black as instructed, remake the pinhole plate with a finer needle if the hole is too large, ensure the magnifying glass is centered over the round lens hole, and adjust the back tracing-paper screen or slightly shift the lens to improve focus while using a darker room and brief shutter openings.
How can I adapt this activity for younger children or older kids?
For younger children have an adult pre-cut the 2.5 cm lens hole, prepare and tape the pinhole plate and black-lined box ahead of time and let them decorate and slide the shutter, while older kids can poke their own tiny needle pinhole, try swapping different lenses and precisely move the back screen to study focus.
How can we extend or personalize the cardboard camera beyond decorating?
Add a toilet-paper-roll tripod or cardboard brace for stability, make several interchangeable pinhole plates with different hole sizes to compare images, attach a smartphone to the back screen to photograph the upside-down image, or tape colored cellophane over the lens as simple filters.