The mermaid has a double crank shaft with the addition of four mechanical outputs. Her tail and tail fluke flip up and down, the arms raise and lower alternately to mimic a swimming action and finally, her head lifts and lowers as she swims along astride the box that conceals most of the mechanism. She is made from carved and painted wood with painted finish sealed with yacht varnish for durability. Shipping costs will depend on your location. Please contact us for a quote before purchasing the toy. Thank you.