STEAM Activities: Light Detectives Part 2

Defining the Big Hypothesis: Shadow is cast when we shine light through an opaque object.

Hi Parents / Educators!

In this activity, we will:

  1. Discover that as light is blocked off by an opaque object, it will create a dark shape called the shadow.

  2. Conduct an experiment to see how the size of shadow changes depending on the angles, size of objects, and distance from the light.

Equipment you need!

  1. Torchlight (or Mobile phone with light)

  2. A Wooden Block/LEGO Block/Cup (or any household object that is opaque)

  3. Activity Sheet

Experiment Time!

  1. Place the opaque object on a flat surface. You can also lay a white piece of mahjong paper or drawing block on top of the flat surface first.

  2. Allow Explorers to shine the light at the object from multiple angles, heights, distances and observe the changes!

Here are some questions that you can ask during the experiment:

  • What do you see?

  • What colours are the shadows formed?

  • Where do you see the shadows? In front or behind the object?

  • Why are there short shadows and long shadows? (Ans: The closer the item is to the light source, the bigger the shadow)

  • What happens when multiple light sources are shone onto the same object at the same time? (Ans: Multiple shadows will be formed)

  • Does the size of an object affect the size of the shadows?

*To increase the level of fun for this activity, you can conduct this in a dark room!

P.S. Remind Explorers not to shine the torchlight straight into their own or their sibling/friends' eyes for safety reasons.


Discuss with your Explorers about their observations and allow them to document them down in the activity sheet! Documenting and recording of observation in written form is an important process for kindergarten explorers. In this activity, we are getting children to see 'cause and effect' as well as recognizing patterns as they conduct this experiment.

P.P.S. We love this video from Dr. Binocs! You can share them with your Explorers to recap what they have learned too!

Check out other Light Detectives activities here:

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