A clay modeling composition and method of manufacture are provided. In one embodiment, the modeling compositions includes reverse osmosis water (50-70 wt %), polymer resin (15-25 wt %), polyethylene glycol (1-10 wt %), lightweight filler (1-5 wt %), sodium tetraborate (0.30-4.0 wt %), glycerin (1-10 wt %), propylene glycol (1-15 wt %), sorbitol (3-28 wt %) and preservatives (0.1-1.0 wt %).