Package 2 - Kindergarten Science - Light and Sound

Join the scientists from Fizzics Education to learn about all about light and sound. Watch the video and then complete some of your own light and sound experiments at home.

Week 5 - Package 2 - Kindergarten Science - Light and Sound

Things your child will need

Have these things available so your child can complete this task.


  • Light and Sound video

  • Coat hanger - triangle shape (for safety, wrap tape around hook end if needed)

  • String, wool or similar

  • Scissors

  • Spoon and fork (optional)

Optional: extension activity

  • Large glass, vase or some other clear container, half-filled with water

  • Water refraction: Test samples print out

  • Paper and pens/pencils (optional, to copy Water refraction: Test samples)

  • Scissors (optional)

Before your child starts

Any experiments involving water should be done away from electronic devices.

What your child needs to do

  1. Watch the Light and Sound video.

  2. Discuss how sound is made by vibrations.

  3. Follow the instructions on Activity Sheet 1: Coat hanger gong (below).

  4. Discuss the results of the activity.

  • What problems did you have (if any)?

  • Will other things make sounds the same way if tied on a string?

  • Can you think of something that works in a similar way, for example a doctor’s stethoscope?

What your child can do next

Looking for more science experiments? Follow the instructions on Extension activity: Water refraction.

Discuss how light can be bounced around by different things and change what we see. What happened to the pictures or words you looked at during the activity? Can you find other things that can bend light or bounce it around?

Options for your child

Activity too hard?

Using materials from the activities or other objects around the house, can you create instruments that make sounds (For example, tapping a spoon and a fork together)? How are they making vibrations to produce sound?

Activity too easy?

Repeat the activity with different materials and see if it makes the same sound! Coat hangers can be made out of metal, plastic, or wood, would that make a difference to the sound you hear? Would tapping the coat hanger on the wall sound different to tapping it with a spoon? Why?

Extension/Additional activity

  • Investigate musical instruments and how they vibrate to make sound.

  • Try out Extension activity: Water refraction.

Activity sheet 1: Coat hanger gong

Sound is created by vibrations. By using string we can get sound to travel from an object to our ears without going through the air. It makes a noise that only the person with the string can hear!


  • Coat hanger (tape hook end if needed for safety)

  • String, wool, yarn, shoelaces or similar

  • Scissors

  • Spoon and fork (optional)


  1. Cut 2 pieces of string, each about as long as your arm.

  2. Tie the two pieces of string to the longest side of the triangle, so when you hold the hook, the strings should be dangling down. Make the knots tight and do a few extra knots so it doesn’t come undone. It’s ok if they slide sideways.

  3. Standing up, pinch the end of the string between your thumb and forefinger, one string for each hand.

  4. Hold the strings up against your ears - almost like putting your fingers in your ears.

  5. Now let the hanger bang against a table, chair, wall or tap the hanger with a spoon or fork.

Did you hear a sound? Can you still hear a sound if you don’t put your fingers and the string against your ear?

Vibrations travel through solids much easier than through air. This is why you can hear a sound clearly when your fingers and string are up against your ear. But if that vibration has to travel through air to reach your ears, it is very hard to hear the sound.

NOTE - Care should be taken not to actually put things into ears - holding against them is enough.

Extension activity: Water refraction

Objects can be:

  • Opaque - does not let light through. e.g. a brick.

  • Translucent - lets some light through. e.g. a frosted window.

  • Transparent - lets all the light through. e.g. a clear drinking glass.

When light travels through different things, it can bend and bounce off in different ways.


  • Large glass, vase or some other clear container, half-filled with water

  • Water Refraction: Test Samples print out

  • Paper and pens/pencils (optional, to draw/write the pictures and words on Activity 2: Test Samples)

  • Scissors (optional)


  1. Cut out each section of the Water Refraction: Test Sample print out along the dotted lines, or draw/write the pictures and words on separate pieces of paper.

  2. For the two rectangles, colour in each with a different colour or fill them in with different patterns.

  3. Look at your picture while holding it behind the clear container near the top half, where there is no water.

  4. Look at your picture while holding it behind the clear container near the bottom half, where there is water.

  5. Repeat steps 3 and 4, this time with the two arrows pointing in opposite directions.

  6. Repeat steps 3 and 4, this time with the two words “WOW” and “WEE”.

Does everything look the same before and after you put it behind the clear container? Do they look the same through water and not through water? What about if you move them closer or further away?

When light travels through the water, it bends. This is called refraction, and the reason why we can see the pictures and words flip around in a particular way!

Water refraction: Test samples

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