A transformable structure reconfigurable between in-line and simulative configurations. Head beading, an anterior engaging bead, anterior appendage beading, a central bead, posterior appendage beading, a posterior engaging bead, and terminal beading are connected in series. The central bead has anterior and posterior cavities, and receivable portions of the engaging beads are respectively received in the cavities when the structure is in the simulative configuration. An elastic core passes through the beading, and the transformable structure can be reconfigured between in-line and simulative configurations by a relative twisting and untwisting of the components. The anterior and posterior engaging beads can be spherical, and the anterior and posterior cavities can be hemispherical. An anterior toroidal ring bead between the head beading and the anterior engagement bead and a posterior toroidal ring bead between the terminal beading and the posterior engaging bead facilitate selective repositioning of the head and terminal beading.