The utility model discloses a device for balanced ball demonstration of interactive bernoulli is felt to body, base and fixation cabinet, fixation cabinet sets up on the base, the three-way pipe both ends are equipped with the bearing and the fixing base is adorned in fixation cabinet admittedly, first port of three-way pipe and fan intercommunication, three-way pipe second end seals, its confined one end has drive gear, drive gear and the drive gear who rotates on the motor mesh, be equipped with the demonstration bobble on the three-way pipe third port, dwang rotation connection is passed through to terminal surface one end under the fixation cabinet, other end lower part is equipped with cam mechanism, the last rotation motor that is equipped with of cam mechanism, the motor linked computers rotates, controlled by the computer, computer link body propagated sensation sensilla. The utility model relates to a structure, it is rationally distributed, be equipped with slewing mechanism and air current size controlling means through the lower extreme taking place air current controlling means, can realize the swing in certain angle, control adoption physically sensitive mode increases interactively and interesting