All play ideasStick and stone sundial

Stick and stone sundial

Plant a stick, mark the shadow every hour with a stone, and tell the time without a clock.

Age 7 to 9 · Year 3 to Year 4Age 10 to 11 · Year 5 to Year 6OutdoorSunny daySun, earth and space week

A whole day of patient noticing, ending with a clock your child built themselves.

What you need

  • A straight stick
  • A dozen small stones
  • A sunny open spot
  • A marker pen

How to do it

  1. 1

    Push the stick upright into grass or soil in an open sunny place.

  2. 2

    On the hour, place a stone at the tip of the shadow and write the time on it.

  3. 3

    Repeat every hour through the day.

  4. 4

    Notice how the gaps between stones change.

  5. 5

    Come back tomorrow and use your stones to tell the time.

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