1, blow up the balloon first, and then hold it down with two fingers.
2. Then stretch the tail of the balloon and turn it around your fingers.
3. Then, put the tail of the balloon into the small hole to complete the knot.
4. Finally, twist one end of the balloon on the tray, go down from one port, then go out from the other port, and circle several times, so that the last balloon port is stuck in the lower seam.
The magical use of balloons
First of all, fireworks
After cutting off the balloon mouth, put the balloon on the toilet paper tube and wrap it with a circle of tape to make a fireworks show. Add confetti and pull the balloon. Wow, it's beautiful!
Second, non-slip coasters
Cut off the mouth of the balloon, spread the lower part of the balloon at the bottom of the cup, and add a safety cover at the bottom of the cup, so that children don't have to worry about knocking the cup off easily.
Third, seal the food cans.
The jar has no lid, but what if the children's favorite snacks are not finished? Blow a balloon and gently press it on the open jar. When the air in the balloon is exhausted, the jar is sealed by the balloon, which is more conducive to the preservation of food.
Fourth, the yeast that blows balloons.
Pour half a cup of hot water into two glass bottles and add 2 spoonfuls of sugar. One bottle was filled with a bag of yeast powder, and the other bottle was not filled with yeast powder as a control experiment. Put a balloon on each bottle mouth, and you can see that the balloon on the bottle filled with yeast powder keeps expanding. Mom's making steamed bread is the same scientific principle as making bread.
5. baking soda for blowing balloons
Put baking soda in the balloon and half a bottle of white vinegar in the bottle. Put the balloon mouth on the bottle mouth slowly, and be careful not to let the powder fall into the bottle. After sealing the bottle, lift the balloon and let all the baking soda powder pour into the bottle. You can see that the balloon is getting bigger and bigger.
Six, balloon rocket
Balloons are filled with air. Hold the balloon mouth or tie a slipknot. Cut a small straw and tape the long straw to the balloon. Two chairs are placed opposite each other, and a long line is tied at the top of the back of the chair. Release the balloon mouth and the balloon will be launched!
Seven, the heart pump
Add half a jar of water to a glass jar and drop a few drops of red pigment. Cut off the balloon mouth, unfold the balloon and cover it on the glass jar mouth. Poke two holes in the balloon with a knife, insert two straws to press the balloon, and observe the working mechanism of the heart pump.