The same word - Chindōgu - used to refer to themselves and inventions of this kind.
Rules of the society is quite hard:
Tindogu not intended for actual use
Tindogu should be embodied in things
An integral part of each tindogu - this is the spirit of anarchy
Tindogu - tools for everyday life
Tindogu not sold
Laughter should not be the sole reason for creating Tindogu
Tindogu - not propaganda
Tindogu not prohibited
Tindogu can not be patented
Tindogu not harmful
Source: ru.wikipedia.org
via factroom.ru