Here is a simple method of making a small rocket engine using simple household materials. If your unclear on how to make it, (IT IS PRETTY DIFFICULT) watch the video which clarifies a lot. :)
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Made By Manish Kumar Step 1: Materials
A-4 Paper (8 by 10 Inches)
Lighter Step 2: Lighter
Make sure that the lighter you are using has great flamage. Like the one I used as seen in the picture.
Follow the Picture Notes and you will be on your way. :)
Step 6: WE ARE DONE
Blow into the Hole made and you get a small cube kind of structure.
Step 7: Fuelling the Rocket.
Fill the hole with gas. This can be done by pressing the lighter button thingy halfly. And then ignite it and your rocket is ready.
Step 8: Diagram
Or you can even use the diagram given to make it. However at Step 12, you still have to cut a small piece off.
Credits : Origami Club