gravity based perpetual motion machine
Status:
New
Accepting:
Designs & Fabrication
Type / Tier:
simple / gold
Quantity:
3
pcs
Material:
n/a
Design price:
Paid US$50
Fabrication price:
Pending
Order #:
20150929233317-267-11-1
Additional Information
I like to design few of these machines for my office desk and for kids school.
