This stool like a balance ball.
When We use this stool, it is necessary to maintain balance by oneself.
There are two roles on a handle.
They are a role to carry and a role which stops a stool.
If a handle is removed, it can roll.
Material:MDF2.5mm 1820×910mm 2sheets
How to make:http://f-labo.tumblr.com/post/63269768665/1
laser cutting machine(trotec speedy 300)
Software : thinkercad > 123D Make > Illustrator
handle data: http://www.thingiverse.com/thing:162964
Stool contest: https://www.facebook.com/TenkaizuBudokai
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