Toys, e.g., swords, guns, shields, to be held in the hand of a user and manipulated/moved. The interior of each of the toys includes a gyroscope, which when operated creates considerable rotational momentum, tending to resist the movement of the toy by the user. This action enhances the user's fun. The...http://www.google.fr/patents/US6030272?utm_source=gb-gplus-shareBrevet US6030272 - Toys having gyroscope-based motion resisting action
Toys having gyroscope-based motion resisting action
