An amusement device for humans or pets has an elongate, semi-rigid, floating tube assembly with an outer, sleeve-forming tube of soft, flexible, buoyant material and semi-rigid, modular, inner tubing inserted longitudinally into the sleeve. The inner tubing is assembled from a series of identical, rigid, tubular, plastic links each having ball and a socket joint at respective opposite ends rotatively engaged with respective socket and ball joints of adjacent links. The engaging/abutting surfaces of the joints form interference, watertight fits to join the links in end-to-end relation to any desired length and enabling the tube assembly to be transversely bent by a person into different stable shapes. A creaking sound, audible to a user or pet, such as a dog, is emitted during rotative movement of the joints during transverse bending of the tube assembly. A bite/chew resistant outer skin/layer covers the outer tube.