Bart Simpson cavorts at a children’s hospital party
Humans dressed as the Simpsons Family, including Bart (front) and Lisa, appear at the annual UCLA Mattel Children's Hospital Holiday Party. The foam-costumed characters were seen at Madame Tussaud's in Hollywood, California on December 1, 2009. Bart Simpson is the family's recalcitrant son, and Lisa its super-achieving daughter. 2009 was the 20th anniversary of the arrival of The Simpsons as a half-hour show on network television.