Solar Pinhole Optical Projection Chamber
An engaging, screen-free learning activity that builds real-world creativity and critical thinking for kids aged 7 to 9.
Materials Needed
- • Sturdy cardboard shoebox with lid (1)
- • Heavy-duty aluminum foil square (5x5cm) (1)
- • Bright white cardstock projection screen (cut to fit inside) (1 sheet)
- • Sharp sewing pin or thumbtack (1)
- • Opaque black electrical or duct tape (1 roll)
Pro Tips
- → Tape black electrical tape over all box seams to eliminate interior light leaks.
- → The sharper and smoother the pinhole in the foil, the crisper the solar disc image will project.
- → On clear days, you can even spot large sunspot groups projected on the white paper screen!
Safety First
NEVER look directly at the sun through the pinhole. Your back must always be turned to the sun while looking into the viewing hole.
How was this activity?
Your anonymous feedback helps us recommend better activities.
Step-by-Step Instructions
Step 1
Cut two 3cm square openings side-by-side on one short end of the shoebox: one for the pinhole lens and one for your viewing eyehole.
Step 2
Tape aluminum foil over the pinhole opening and pierce the exact center with a smooth sewing pin; tape white cardstock inside the opposite far end of the box.
Step 3
Seal all shoebox lid corners with opaque black electrical tape to ensure total darkness inside the transit chamber.
Step 4
Stand outside with the sun behind your back, point the pinhole toward the sun, and peer into the eyehole to observe the glowing projected solar sphere.