Balcony shadow sundial
Solar astronomy, ancient timekeeping, planetary rotation
Duration
25 min
Steps
5 simple steps
Materials
3 household items
Why this matters
Connecting the abstract concept of hours with physical solar movement demystifies the structure of our calendar day.
What you need
- A cardboard circle or paper plate
- A pencil or straight twig
- Chalk or pen
How to do it
Poke a straight pencil vertically through the center of a paper plate, taping it firmly underneath.
Place it in an open sunny spot on a balcony or terrace that receives steady sunlight all day.
At 9:00 AM, draw a line along the shadow and write '9'.
Return at 12:00 PM and 3:00 PM to trace the shifting shadow line.
Discuss how our ancestors tracked time through Earth's rotation long before batteries and digital clocks existed.
Finished doing this activity?
Mark it done when you and your child have tried it.
Parent tip · What to say
“Keep the plate taped down in the exact same orientation so the compass angle remains unchanged throughout the day.”
What your child practices
Planetary rotation mechanics, time measurement history, and observational recording.
Safety & Supervision
Remind children never to stare directly at the sun.
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