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Sugar rocket propellant
Candy propellant is popular in amateur experimental rocketry, mainly due to the availability of the chemicals and ease of use. It is usually prepared by melting potassium nitrate and sugar together, but this is obviously a somewhat dangerous operation. Dry mixing is possible and much safer but produces lower quality propellant.
Flying paper butterfly prank
In this video I’m going to show you how to make a flying butterfly using paper iron wire… Now you can put it inside a coursebook or a birthday card =P You can download and print the pattern as a JPEG image or as a PDF.
Mechanical Pencil Mini Gun
Here is a quick tutorial on how to turn a mechanical pencil into a mini gun. Chronograph speed test: kinetic energy speed (m/s) speed (fps) Average 0.0847 J 22 m/s 72 fps Max 0.128 J 27 m/s 89 fps Don’t forget to check the 170 fps compressed air blowgun.
Laser lighters for sale
Hi everybody, I had a lot of request about selling laser ligthers… So after a small survey, the pre-orders are finally open.
Duplicate a key with a can
Do you want to quickly copy a key ? You can do it within 5 minutes using a soda can !