I would choose the ‘Where is the Shadow’ experiment. I would take students outside on a sunny day to observe their shadows. Ask them to trace their shadows on the ground at different times (morning, midday, and afternoon) and predict how the shadows might change over time.
As the day progresses, have students revisit their traced shadows and compare them, noting changes in length and direction. Discuss why shadows move and change size, introducing the concept of the Earth’s rotation and how the Sun’s position in the sky affects shadows.
I really love that these lessons can be made so hands-on as it can be overwhelming at times to tackle such an abstract topic with younger children.
This activity promotes observation, prediction, and critical thinking, helping students understand the relationship between the Sun’s position and shadows through hands-on, inquiry-based learning.