Styrofoam• A giantStyrofoamheart to send to your true love, from Better Than a Letter, $ 4. 50.• The little Styrofoam houses he used to show off his idea were as far as the schemeadvanced during his tenure.• Inside, covered by a light packing of Styrofoambubbles, were thin plastic envelopes showing the glint of metal.• The Styrofoam plant is now wholly owned by Dow.