Make homemade plastic ring

Children made plastic as photo.
Only needed milk and vinegar and food coloring~.
The acid in the vinegar react with the casein in the milk making the plastic.

After making plastic mold what you wanted shape like as star or heart, you can get your own accessories.

Procedure : Boil the milk( 200ml ) with food coloring until simmering.
and then add vinegar ( 16:1 ratio, milk to ninegar ) and stir until it begins to gel. And mold it to beautiful cast.
Now let it cool and wash rubbery stuff with water.

You get your own ring~~~

My new classroom~~

My new school will be opened in next month.

Surrounded by the beautiful mountain of Oseo and large pond.

Natural Soda-Pop Recipe

Our children learned as following scientific facts through making natural soda-pop.

1. Gas solubility is high when higher pressure and lower temperature.

Needed materials : Bottle with lid not to leak air. If wrap the lekage of bottle, it will be higher pressure.

And, ice can be lower temperature in bottle.

Citric acid can be extracted from the juice of oranges, lemons but you can buy it easily from drug store.

And baking soda ~ The bubbles coming up from the bottom of bottle is "Carbon dioxide" gas.

and orange to add taste.

Wasp vs Bee

Wasp has waist separate thorax and abdomen.

And they can beat their wings 130 times per 1 second.

Average bee can beat 80 times per 1 second.

And, wasp like to live in solitary.

So you can see them on window in sunny spring days.

After hibernation in winter.

How do plants absorb water?

Flowers absorb water through the xylem found on the stem of plants.

The xylem is to transport water and nutrients from the roots to all parts of the plants.

This process is called "Capillary action".

As photo, you can change the color of carnation. (The white petal is ready to change to light yellow)

And, solar energy pull the water up through the plant. Sunlight evaporates the water from surface. This transportation process is called "Transpiration".

The top of the xylem tube become empty from the loss of water, creating a vacuum so water rises to fill empty space.

If you want to mix color, note attached photo.