Hello,
In this video, I will show how to make these 6 simple inventions.
1- RPM counter https://drive.google.com/open?id=1WWXfImINnV7_8s6lSKhCjuYWgeqGx68m
2- Teaser https://drive.google.com/open?id=1FifJe0Qzr04wkioQK8GgcpYSAjRAw9x9
3- winder machine
4- Simple inverter
5- Hair dryer
6- Coins gun
Hope you enjoy the video.
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