The irony is…

…that the plasticine from which Morph is formed is not exactly the most environmentally friendly material you could think of made, as it is, from calcium salts, petroleum jelly and aliphatic acids.

(Got to love that Wikipedia entry too. And I quote: “Plasticine: Not to be confused with the Pleistocene epoch which is part of the geologic timescale.” Glad we got that clear.)