Not all science experiments require sophisticated, fancy, or expensive materials from laboratories. You can try many projects with your kids at home using just the ingredients from your kitchen. Continue reading to learn fun kitchen science experiments for kids and the science behind these kitchen chemistry experiments.
1. Make Water Fireworks
Do not worry! There is no actual explosion involved. All you will need for this fun kitchen science experiment is water, food coloring, and oil. With this experiment, you can teach your kids about the diffusion of liquids. It is quite famous among various fun science experiments. Here are the steps you can follow to make water fireworks:
- First, you have to take a tall glass and fill it with room temperature water. Fill it a little less than full.
- Take the other glass and add two tablespoons of oil into it.
- Now, add two drops of food coloring to the glass.
- Stir both oil and food coloring until you see the food color break into smaller drops.
- Now, pour this mixture slowly into the glass with water and witness the magic as the mixture slowly sinks in the water with each droplet expanding, just like a firework!
Science behind the experiment: Food coloring dissolves in water but, not oil. When we pour the oil and food coloring mixture into water, the oil will float because it is less dense than water. However, the food coloring will begin to dissolve after it passes through water.
2. Make Oobleck Slime
Oobleck slime is one of many fun science experiments that kids love, especially dipping their hands into the slime and playing with it. All you need to make oobleck slime at home is corn starch, food coloring, and water. Here are the steps you can follow to make oobleck slime:
- Take a bowl and add one cup of water to it.
- Then, add your choice of food coloring to it.
- Add two cups of corn starch and mix until oobleck is formed.
- Adjust the consistency with water and corn starch until the oobleck is perfect. That is if the mixture is too watery, add more corn starch to it. But, if the oobleck is not dripping from your hands, add more water.
- You can now dip your hands into it and make a ball out of oobleck. Let go of the ball and witness it fall right out of your hands!
Science behind the experiment: Oobleck is something that acts both like a solid and a liquid. It is an example of one of the non-Newtonian fluids and does not maintain the same viscosity. When you apply pressure or agitate oobleck, it begins to act like a solid instead.
3. Make Rock Candy Crystals
Another one among fun kitchen chemistry experiments is making rock candy crystals. All you will need is sugar, water, lollipop sticks, food coloring, and flavoring extract. Children will require adult supervision while trying out this experiment. Here are the steps you can follow to make rock candy crystals:
- Take a few lollipop sticks or bamboo skewers. Dip the lollipop sticks in water and roll them on a plate of powdered sugar. You will see the tiny sugar crystals sticking on them.
- Once you have coated the sticks, allow them to dry for about 25-30 minutes.
- Take a medium-sized saucepot and add 1 cup of water to it. Place it onto a stove and turn the flame to medium.
- Once the water begins to simmer, add one cup of sugar. Add one more cup of sugar after it dissolves, and repeat until you have added a total of 3 cups of sugar in the water. Stir the mixture and let it boil.
- Once it begins to boil, add food coloring and your choice of flavoring. Mix it well and turn off the flame. Let the solution cool off for about 20 minutes.
- Now take a mason jar, about 800ml size, and add a circular ring to the top of it. Pour in the sugar solution. Make sure to leave an inch of space at the top.
- Dip one of the sugar candy sticks in the solution and attach a clothespin at the top to hold it on the jar. Make sure there is a half an inch gap between the base of the jar and the stick. It will take about 5-7 days for a rock candy to form.
Science behind the experiment: This fun kitchen chemistry experiment is based on the principle of supersaturated solution which means that there are a lot more dissolved particles of sugar than the water can hold. So, when you cool the water, the sugar particles fall off as the water precipitates. It then connects with other sugar particles and a rock sugar candy is formed. (See Why do kids love candy so much?)
4. Make Invisible Ink
This is one of the fun kitchen science experiments. Write a secret message to see how it turns invisible once the paper becomes dry! The ingredients you need for this experiment are water, baking soda, and grape juice. Here are the steps you can follow to make invisible ink:
- Take a bowl and mix 1/4th cup of baking soda and 1/4th cup water.
- Dip a paintbrush or a cotton swab into the mixture.
- Write your secret message on a piece of white paper and let it dry.
- Take a paintbrush or a cotton swab and dip it into grape juice.
- After the paper has completely dried, paint over it with this juice and witness the magic as the secret message reveals itself!
Science behind the experiment: A chemical reaction takes place when a base (baking soda) is mixed with an acid (grape juice) which results in a different color when it is applied to the invisible message. This in turn makes the invisible message appear.
5. Make Magic Milk
Magic milk is one among other fun kitchen science experiments wherein you can easily create a rainbow color magic milk with basic ingredients like milk, dish soap, and food color. Here are the steps you can follow to make magic milk:
- Take a shallow bowl and pour some milk into it until it covers the bottom.
- Add a few drops of food color, but the more the better. Be sure to add around three to four drops of each color.
- In this mixture, add one drop of dish soap to the center. Watch the colors as they dance across the surface of the milk.
Science behind the experiment: Soap molecules have two ends: The hydrophilic end- water-loving and the hydrophobic end- water-fearing. Fat molecules do not dissolve in water as they are non-polar. When you add soap into milk, it separates the water and the fat in the milk. The hydrophobic end of the soap breaks up the molecules of fat, while the hydrophilic end connects the water molecules. Now the water and fat are connected by soap molecules. As the soap gets connected to the fat molecules, the color gets pushed around everywhere, and you can see this in the form of an explosion.