


September 9, 2022
Science, or the “catch-all” term we now use, STEM, is all about discovering how our world works, which means that science – and the chance to experiment with it – is all around us. So, helping your child delve into the world of STEM doesn’t mean you have to invest in any specific toys or kits. You can find what you need for fun and educational experiments lying around at home. Read on and try some for yourself.
Safety note: remember safety first! Always. Always wear gloves, aprons and goggles if any hazardous materials are being used, and always chat to your children about the possible dangers of trying things without an adult present.
1. Make water walk
What you need:
How to do it:
The science explained:
The water moves up through the fibres and gaps in the paper towel in a process that’s called ‘Capillary Action’. This is essentially how water and nutrients travel from a plants roots through to its stems and leaves – the water travels up the capillary tubes (which are the gaps in the paper towels fibres) against gravity, because of the forces between the water and the fibres that are interacting with each other.
2. What’s on my teeth?
What you need:
How to do it:
The science explained:
By placing the eggs in different liquids, you are exploring the reactions of acids and bases when they come into contact with one another. Plus, this experiment is a great way to convince your child to brush their teeth! The eggshells represent the enamel on your child’s teeth. When they came into contact with the cooldrink, they were stained – much like our teeth can get stained by food and drink. The vinegar broke the eggshell down, which shows how our teeth can form cavities if not cared for. But, the eggs covered in toothpaste didn’t get stained or worn down, showing that brushing our teeth helps protect them and keep them strong.
3. What is amplification?
What you need:
How to do it:
The science explained:
This one is all about sound waves, showing you how sound travels through air, water or another medium to reach our ears, and how directing those waves in certain ways affects how we hear them. When you listen to music on your phone without the amplifier, the sound waves travel all around you in the air – they are spread out around the room. When you put the phone into the DIY amplifier, the sound waves are directed through the toilet roll tube and out of the paper cup speakers. Because the sound has been directed and focused, you hear it louder (and it’s not as tinny).
Read more Crawford International blog articles here.