Required tools and materials		The reason why the jelly in a left PET bottle is brown is that brown sugar has melted into it. It looks like cola.
PET bottle of a carbonated drink	It is good to choose the PET bottle of a carbonated drink so that the pressure applied inside a bottle can be borne. The caps of these bottles have dual structure and shut up gas inside.
drill	It makes a hole in the cap of a PET bottle.
Silicone tube and joints	A cap and a tube are connected at joint.
Ceramic stone	It is connected at the tip of a tube. In order to make CO2 melt into water, the stone is better which can take out finer bubbles. A piece of wood is sufficient.
Silicone bond	It pastes up a cap and joint.
Yeast fungus	Confectionery material. You have to do frozen preservation of the yeast fungus which remained without using this time. From a bag, extract air and close firmly.	Silicone bond for glasses and plastics. You can use this also for repair of a tank.
Powdered gelatin	Gelatin or agar.
Sugar	Food of yeast fungus.	It pierces through joint from the reverse-side of the hole made in the cap, and fixes with silicone bond. When silicone bond gets dry and becomes hard, tie a tube to joint.
Water	Water for making jelly from gelatin, and water which becomes the life space of yeast fungus
Recipe. When you use 500ml PET bottle
- Gelatin 5g and 100g of sugars, 120ml of water, 2-3g (about a half of small spoon) of yeast fungi, 300ml of warm water TOP

How to make it,		After setting the carbon dioxide system, about two weeks have passed. The leafs and the roots increased. ?Before/After? It's before setting the Co2system
1.	Put water and sugar into a pan and heat them. Stir with chopsticks or a whisk and melt sugar.
2.	Check whether all sugars have melted.
3.	Put gelatin into a pan little by little. Putting in gelatin, stir and melt it.
4.	When jelly becomes warm, before it will get cold, put into a PET bottle. If it is too hot, a PET bottle will melt.
5.	Ehen gelatin gets cold and it solidifies firmly, 300ml of water will be poured out on it.
6.	Scatter yeast fungus in the water of a supernatant fluid. It is easy to use the funnel made from post card.
7.	Cap a PET bottle with the cap which connected the tube. If you wait from dozens of minutes for several hours, CO2 will come out from the point of a tube.
When yeast fungus begins activity, the water surface will bubble. Leave space to the direction on a PET bottle. Don't put in water too much. Before losing jelly, when activity of yeast fungus has stopped, replace the water of a supernatant fluid by the half. If you add a little yeast fungus, a still better result will be brought.
Yeast fungi eat the jelly containing sugar and propagate. Therefore, if half exchange of the water is carried out, it will work again. 5 hours after replacing water. Foaming is possible for the water surface.

!Notes!

You should consider so that CO2 handmade system may not be toppled. If a PET bottle is toppled, foaming will become active like a left picture. Bubbles overflows from a bottle and go the inside of a tube toward the tank. Bubbles will become still more active if you are going to open the cap of a PET bottle. I think that how to probably bend at all will probably be good until foaming settles down. The tip of a tube should take out out of a tank. TOP

The difference in foaming accoding to the seasons You will use warm water, in order to melt a yeast fungus, when making breads.And you will keep the remaining yeast fungus in a refrigerator. It will control those fermentation. Yeast fungus becomes active or is not so influenced by surrounding temperature. This is the difference point from the cylinder which can supply a favorite quantity of gas at any time you like . The fermentation of CO2 system may stop in cold winter. By warming the circumference of a PET bottle, you can activate the foaming. Pour out warm water on jelly. A PET bottle can be placed on the light of a tank (Consider so that a bottle does not fall or topple.). Break jelly and increase the area in contact with Yeast fungus. Much sugar are put into jelly ,the amount of carbon dioxide will also increase. If there is much water on the jelly, the activity period of yeast fungus will become long.

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