Experience the physical phenomenon of "force transmission" through toys. Qiao Hu hydraulic catcher is a toy suitable for children aged 6-7 months. The principle is to experience the physical phenomenon of "force transmission" through toys and have a more specific understanding of "force". There are six ways to play Qiao Hu hydraulic catcher. Use four groups of needle tubes to control the front and back, up and down, left and right movements, grasp the ball to operate the toy, and experience the transmission of force.