What small inventions can pupils make?

Pupils can make a drink bottle rocket invention, the specific method is as follows:

Preparation materials: 2 pieces of green card paper, red-headed document 1 roll, mineral water 1 bottle, glue 1 tablet,

1. When the materials are ready, roll them into a cone with a green card. The effect is shown in the following figure:

2. Then wrap the green cone with red tape to make the rocket head. The effect is shown in the following figure:

3. Then clean the mineral water bottle, as shown in the figure below:

4. Cover the red cone at the bottom of the bottle, as shown in the figure below:

5. Then use green cardboard to fold out four triangles, the shapes of which are shown in the following figure:

6. Finally, stick four triangles on the bottle mouth, so that the rocket is finished.