Material preparation: balloons.

1 First prepare a pump, pink and green balloons.

2. Be careful not to fill the pink one, leaving five centimeters and the green one two or three centimeters. Pinch the two circles on the top of the green one in half, screw up the remaining three-thirds 1, and fold the remaining four or five centimeters in half. The same operation is done on the other side.

3, then make flowers, take the top two or three centimeters, pull your head down and fold it in half, fold five flowers down, and the shape of the flowers will come out.

4. Finally, put them together. There should be a hole in the flower where the head of the leaf can be put in for adjustment.

Introduction to balloons:

Balloon concept:

A balloon is a sealed bag filled with air or other gases. Balloons can be used not only as toys and decorations, but also as vehicles. If the balloon is big enough, the gas inside is lighter than the air of the same volume, and the buoyancy generated exceeds the weight of the airbag and attached objects (such as hanging baskets and hot air balloons), the balloon can rise.

So it can be used to carry observation instruments and passengers. Unmanned balloons loaded with equipment are often used for scientific research on the atmospheric environment at high altitude and sometimes for measuring cosmic rays. In most countries, cities and other places, people like to use balloons as festive supplies to decorate places on festivals to achieve the effect of rendering the atmosphere.

Balloon classification:

Model airplane arch, hydrogen balloon, latex balloon, musical ball, lift-off ball, water polo, pearl ball, real balloon, magic balloon, fluorescent ball, hot air balloon, balloon electronic Kongming lantern, ball in the sleeve, ball in the ball imitation ball, long ball, explosion ball, threaded ball, luminous ball, helium balloon, model airplane cartoon, cartoon balloon, balloon printing, balloon weaving and toy balloon.

Balloon history:

Hot air balloon has a long history in China. It is called Sky Lantern or Kongming Lantern. Joseph Needham, a famous scholar, also pointed out that Mongols used dragon lanterns to transmit signals in the Linitz Battle of 124 1 year. On 1783, the French montague brothers released the first balloon filled with hot air in Europe. French brother Robert was the first person to fly into the sky in a balloon filled with hydrogen.