science experiments for kids

We owe a lot to science, I mean, just try and imagine a world without it… No televisions, no computers – not even ice cream! 

If you’re mad about science, try having a go at creating some of these exciting experiments put together by Hazel Rymer, Lead Educator of free, online course, Basic Science: Understanding Experiments. They’ll give you a good understanding of how science works, and you’ll have fun, too!

Just make sure you get a parent or guardian to help you.  


Science experiments for kids


Grow your own greens!

science experiments for kids

All plants need water, sunlight and a home to live in (usually in the ground), but some plants, like cacti, need less water than others (that’s why they grow in the desert). Here you’ll explore how plants grow in different environments.

What you’ll need

-1 packet of radish/cress/mustard seeds

-3 small plastic pots

-Soil to fill the 10 pots

-Tap water

-1 measuring cylinder

-1 notebook 

-1 pen

Step 1

Fill the three pots with the same amount of soil, and place approximately five seeds in each pot. 

 Step 2

Add 25ml of water to each pot.

 Step 3

Place one pot in the cupboard, one in the fridge and one on your windowsill.

 Step 4

Each morning and evening for about a fortnight, add 25ml of water to the pot, and make a note of anything you notice about your plants.

Why it works

You should expect to see the healthiest looking plant has been grown on the windowsill. This is because while all the seeds had soil and water, only the seeds on the windowsill had access to light, a key component in order to grow.


Rocking rock formations!

science experiments for kids

There are three types of rock: igneous, sedimentary, and metamorphic. Igneous rocks form as a result of the cooling of magma (lava). When magma cools and hardens, it becomes a rock. Sedimentary rocks are a mixture of other materials that have been re-deposited, and re-solidified through compression and cementation. Metamorphic rocks are types of existing rocks that have been altered in form as a result of changes in heat and pressure. See which ones you can identify in this experiment!

What you’ll need

– A magnifying glass

– A mixture of rocks found from as wide an area of locations as possible

– Good lighting (so you don’t’ strain your eyes)

– Sticky notes to label each rock

– Notebook 

– Pen 

Step 1

Label each rock with a number so when you record your findings, you can easily identify which rock you’re commenting on.

 Step 2

Choose a labelled rock.

 Step 3

Look at it through the magnifying glass.

 Step 4

Look carefully for crystals and other structures within the rock that could determine what it is.

 Step 5

Make a note of what you can see from each rock using your notebook of your findings.

 Why it works

Igneous rocks are easily identifiable because they contain angular crystals. The longer the igneous rocks take to cool and crystallise, the larger the crystals will become. Sedimentary rocks generally have more of a layered appearance because of the different rock types being pressed together. Metamorphic rocks can look layered, but the layers often aren’t continuous and they tend to be very small scale. The rock will look like one fused mass rather than separate crystals. 

Have a think, what would each rock be best used for? Can you identify where we use rocks? 


See how plants ‘drink’!

science experiments for kids

The aim of this experiment is to prove that plants do take in water.

What you’ll need

– 2 sticks of celery or white-petal flowers, (such as carnations)

– 2 empty glasses 

– A food colouring of your choice (red or blue is best)

– Knife (your guardian will need to use this)

– Water

– Notebook

– Pen 

Step 1 

Using a sharp knife, (ask your guardian to help) cut roughly 2cm off the bottom of the celery sticks.

 Step 2

Fill one of the glasses roughly 1cm high with food colouring and add an extra 0.5cm of water to it. Fill the second glass with just 1.5cm of plain water.

 Step 3

Place the freshly chopped end of one of the celery sticks (or carnations) in the water.

 Step 4

Place the other in the clear water and leave overnight.


You should find that the leaves of the celery (or carnations) have become a colourful work of art! This proves that the plant has taken up the coloured water you made.


Basic Science: Understanding Experiments is a free online course available on FutureLearn from the 8th August 2016. You’ll even can get a Statement of Participation for completing it!
 You can also share your experiments online as you go using the hashtag #FLSciExp16.



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  • Irene


  • Callum

  • emmanuel


  • Emz

    Can you post the mug cake one!!!

  • Hannah

    Love it!

  • jimbob101

    they actually work. im impressed.

  • JimmyBob

    OMG! Tried the flower one at school and it worked so well!! Don't use faint colours though like pink or yellow. They don't work but we used a white rose and blue food colouring!! It worked so well! I RECOMEND IT!!!

  • WOW

  • haylee mansson

    i luv experimenting

  • Luna Testai Garcia

    I all ready did the cress experiment when I was in year1/class2!

  • Eaglegirl2016

    Im definitely going to try the last one its so cool!


    wow what a nice experiment


    wow what a good experiment i will do this in my science exhibition

  • SweetieBetty

    i love making experiments! ill try to dye some carnations for my birthday party.<3

  • welton

    best trick ever espesily the food colouring one

  • nkokay123

    cool especially the flowers/celery

  • naturebreeze007

    cool experiments ive tried some of them with my grandma in her garden

  • k1tk47

    Some of the experiments are a bit tricky because they request a few items that I cant get hold of easily.



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