Let’s dissolve egg white using shampoo!

Shampoo has ability to denature protein.

Let's put the shampoo into white egg and observe the denaturation of protein.

First, put the white egg into the glass.


Next, put the shampoo into the glass of white egg.


After a few minutes, you can observe the denaturation of protein.


In the exam, you and your kids find that the excess shampoo may hurt your hair.

Hope you and your kids enjoy the exam.

Difference between a raw and boiled egg

Do you or your kids know how to distinguish between a raw and boiled egg?

It's easy to distinguish.

A raw egg does not coagulate.
Therefore, it's hard to start spinning and stop.
Look at the movie as follow.
You can see the slow rotation and when I stop the rotation, the egg does not stop immediately.

On the other hand, a boiled egg coagulates.
Let's spin the egg to learn.
You can see the faster rotation and when I stop the rotation, the egg stop immediately.

Hope you and your kids enjoy the exam.

Float the ping-pong ball in the air!

Float the ping-pong ball in the air!

It’s easy to setup and you can have fun with your kids.

Setup a blower as shown in a movie and turn on the switch.

Please note that hot air may be dangerous to the ping-pong ball because the air generates by a blower.

Put a ping-pong ball on the generated air gently!

Observe the ping-pong ball is dancing.

Did you know that the ping-pong ball can float in the air?

Hope you and your kids enjoy the exam.

Make a coin run in the balloon!

Let's make a coin run in the balloon.

Firstly, you need a balloon and a coin.
The light coin is desired as shown here.

Next, the coin is put into the balloon.

Inflate the balloon and fasten an entrance of it.

Lastly, make the coin run in the balloon as shown in the video.

This fantastic moving is caused by Gyro effect.

Did you know why the coin runs stably?

Hope you and your kids enjoy the exam.

Let’s make a telescope with your kids!

A telescope is expensive tool to observe moon, the stars, and etc.

However we can easily make the telescope. 

At first, we should prepare two magnifying glasses (A, B). 
Glass (A) can attach to the distal position. 
Larger lens (A) is desirable. 


Glass (B) can attach to the proximal position. 
On the other hand, smaller lens (B) is desirable. 


Attach these lenses to rectangle or circled pasteboards as shown in the photo. 



Assemble a telescope as shown here. 

Be in a focus adjusting the difference between two lenses. 
Although you can see it is upside down through the hand-made telescope, I think you are surprised at the ability of it. 

What did you see through these lenses?

Hope you and your kids enjoy the exam.

Let’s make a couple of coins shine!

Japanese 10-yen makes of copper. 

Old 10-yen coins are often oxidized, and the color is dark blown. 
In this photo, left is new coin in 2012, middle one is in 1974, and right one is in 1966. 

Let’s make these coins shine. 

We prepared two liquids. 

One is squeezed juice of a lemon. 

Other one is vinegar. 

After these coins are sunk in two liquids, wait 3 minutes. 

You can observe the clean coin which was sunk in the lemon juice. However, the coin in vinegar is unchanged. 

8 hours later 

You can observe the efficacy of vinegar.

24 hours later

Right black blown is a non-sunk coin.

The effect of deoxidization is fantastic.

Hope you and your kids enjoy the exam.

Let’s dissolve an eggshell

Let’s dissolve an eggshell in vinegar water.

It takes a couple of days until the unshelled egg.
Can you see the air bubble around the egg?

1 day later, the eggshell is dissolved a little.

5 day later, the eggshell is dissolved completely.

Awesome result! The eggshell was dissolved completely.We can observe the beautiful transparent semipermeable membrane.

Look the photo which compared with a raw egg.The transparent egg was bigger.
When we observe it through the light, the beauty was the best!

Hope you and your kids enjoy the exam!