An exhibit of Tsunahiki (tug of war) to which the technology of the power assisted system (P.A.S.) for bicycles by Yamaha Motor Co., Ltd. is applied to help visitors find the power themselves.
When the rope tied to the drive part is pulled from both ends, assisting power is added only to one side according to the pulling strength to reduce the labor on that side.
Each time a younger child wins Tsunahiki with power assistance over an older child, or an adult, a shout of joy arises.
On Christmas day in 2009, this device was given to the Hamamatsu Science Museum in Hamamatsu city, Shizuoka prefecture, and it is now displayed in the Corner of Power on the 2nd floor.
