TOKYO, JAPAN:  NEC's new child-care robots, 'PaPeRo', line up during their press preview in Tokyo, 16 March 2005.  The 38.5cm-tall child-care robot developed to be display at the World Expo 2005 Aichi from the company's latest communication robot, PaPeRo 2005. The robot can play with children singing and quizing.   AFP PHOTO/TOSHIFUMI KITAMURA  (Photo credit should read TOSHIFUMI KITAMURA/AFP/Getty Images)