Compare hand spinners 3 species

A hand spinner that it has an effect of enhancing concentration.
I got three hand spinners this time and compared it.
The first one is the weight of each feather with three common feathers.
It is a little heavy so it turns relatively well.

The second one is a product to be cut out of two pieces.
It is small and light, so it is suitable for turning with one hand.
Rotation time is relatively short.

The third is a small item of three places.
The bearing accuracy is high, and it can be spun for a considerable time just by pushing lightly.

It is the last 3 videos we took together.
The 3rd hand spinner turns more than 3 minutes, so I made it a time lapse movie.