Fun Science: Science Experiments you can eat!

Bored of what to do on the weekend or after school? Have you ever wanted to create your own edible science experiments? Then why not try out some of our fun science experiments that are easy to do at home and are edible! Check out the post for 5 exciting experiments.

1. Make your own raisins

This is a fun and easy science experiment that you can do at home. For this experiment you will need red seedless grapes, a baking tray and grease proof paper.

First of all you need to thoroughly wash and dry the grapes and place them on the baking tray. Make sure there is space between each grape so that they don’t stick together.

Make your own raisins

Make your own raisins

 

Cover the grapes up with the grease proof paper making sure it won’t blow away. You might need to weigh it down or use masking tape to prevent it from blowing away.

Don't forget to cover those grapes!

Don’t forget to cover those grapes!

You then need to place the grapes in a safe place outside in the garden or on the window seal (this may take longer). If the nights are damp, take the grapes inside on an evening and put them out again the next day.

 

After three days you should be ready to eat the raisins! What do you notice about the raisins? Are they smaller than the grapes? Are they lighter than the grapes?

If any of your grapes rot or get damp, remove them from the tray. Dry grapes will shrivel and turn to raisins, they won’t rot.

 

 

The Science bit:

Drying red grapes in the sunshine turns them into raisins.

The heat from the sun causes the water to evaporate from the grapes. It also heats up the sugar, causing it to caramelise. The water has evaporated so the raisins are smaller and lighter than grapes. The caramelised sugar makes the raisins taste sweet.

Do you know how to make sultanas? Try the same experiment with white grapes!

2. Make your own slushies

I have always loved these ever since I was little and have always wanted to make my own. With this quick and simple experiment you can make your own slushies in no time. For this experiment you will need a plastic bag with a seal (sold in most supermarkets), salt, water, any fizzy drink or fruit juice and a freezer.

First of all you need to fill the plastic lock bag with 1/4 of water and one tsp of salt and place it in the freezer over night.

 

Next you need to remove the bag from the freezer and then pour in the fizzy drink.

Slushies

Slushies

 

The fun bit– make sure the bag is sealed tightly, you may want to use another bag to ensure nothing leaks out of the bag. You need to shake the bag up and down for a few minutes until the mixture resembles a slushie. Pour your mixture into a glass and enjoy!

 

Shake it!

Shake it!

 

 

 

The Science bit:

The frozen saltwater looses heat energy which keeps it in fluid form. When the liquid fizzy drink touched the frozen bag of saltwater, the saltwater began quickly absorbing the heat from the fizzy drink. It actually absorbed the heat from the drink much more quickly than the fizzy drink could absorb new heat from the air Рso the drink lost heat and froze.

 

 

3. Edible Play dough

We have all tried eating play dough at least once in our lives, much to our disappointment it didn’t taste great. But, despair not! Edible play dough is all the fun of regular play dough and it tastes good too!

For this experiment you will need ready made frosting (any flavour), icing sugar , oil, a wooden spoon and a mixing bowl.

Ready made icing

Ready made icing

First of all you need to mix the frosting with the icing sugar. You will need to mix the ingredients together and keep adding icing sugar until the mixture is not sticky and can be rolled in your hands.

You will then need to add 1- 5 tsp of oil to prevent the mixture from drying out- You now have your play dough mix!

Why not try experimenting with different colours or make your own icing and add food colouring!

edible play dough

edible play dough

 

 

 

 

 

 

 

 

 

 

4. Make your own butter

This is an interesting experiment that is really quick and easy to do and uses simple everyday ingredients.

For this experiment you will need a glass jar with a lid (such as a jam jar) and whipping cream.

 

First of all you need to fill the jar half way with the whipping cream.

 

Then you need to put the lid on the jar and make sure it is on nice and tight.

 

The fun bit– get your kids to shake the jar up and down, really fast for several minutes.

How to make your own butter

How to make your own butter

 

The next step is to check the process is working by taking the lid off and testing whether the cream has thickened- go on dig in!

You will then need to place the lid back on the jar and continue to shake the jar. You may feel that the jar is easier to shake. This is because the butter milk has started to separate from the butter and your butter is almost ready.

You will need to keep taking the lid off to check whether your butter is ready. Once the cream is completely sold it has turned into butter!

 

You then need to rinse off the butter with water and kneed out any excess butter milk.

Cover and place in the ridge for a couple of hours so that it hardens.

Why not try your butter on toast? Does it taste the same as shop bought?

Butter

Butter

The science bit:

When you are shaking the cream around in the jar, what you’re ultimately doing is smashing the little globules of fat into each other, damaging their walls and causing the hydrophobic (water-fearing) regions to clump together. The cream will become thicker and thicker as more and more fatty triglycerides gather into one mass. Eventually, enough fat is exposed and there’s room for everyone to get together, eliminating the need for triglycerides to partner up with air.

Once air leaves the network it collapses and the water that was being held in suddenly separates from the solid mass of butterfat.

 

5. Fizzing Lemonade

This is a fun and exciting experiment that is suitable for all ages. For this experiment you will need 1-2 lemons, bicarbonate of soda, cold water, sugar, a juicer, a glass, a spoon and a measuring spoon.

First of all you need to squeeze the juice of one lemon into a glass.

Squeezing a lemon

Squeezing a lemon

Then add 1 teaspoon of bicarbonate of soda and stir.

lemon

 

 

 

 

 

 

 

 

Add some sugar to water to taste and add to lemon mixture. (There should be more frothing but not as big as the first reaction. Why do you think that is?)

Finally you need to taste your lemonade! (What can you notice? What can you feel on your tongue?)

Home made lemonade

Home made lemonade

The Science bit:

When the lemon juice (acid) and the bicarbonate of soda (base) mix, they form a chemical reaction known as an acid-base reaction. This is the same sort of reaction that you get when you mix bicarb soda and vinegar, such as in the classic erupting volcano experiment. The reaction produces as gas called carbon dioxide (CO2) which creates bubbles when formed in a liquid like in this fizzing lemonade experiment. This process is called carbonation.