What's made of cardboard, papier mache, pieces of a broken blender, parts from a transistor radio and corks, and makes beeping and whistling noises as it cruises down the street?

If you live in Springfield, this creature, a copy of the R2D2 robot from the movie "Star Wars," may come trick-or-treating to your door with 8-year-old Jorn Schaffner inside. Jorn's mother, Luray Schaffner, a printmaker at Alexandria's Torpedo Factory, constructed the costume over a three-week period using a garbage can for a form and "junk from the drawers" to make the control panel, and then painted it white, blue and silver.

"Jorn waits until the very last minute every year to make up his mind what he wants to be for Halloween. This year I made him decide early," says his mother. They are also planning to insert a tape recording of the gibberish (as far as we know) language of R2D2 from the "Star War" record into the costume.

Jorn has been "Star Wars" seven times, but he hasn't told his friends about the costume. "I'm going to surprise them on Monday," he says.

Helping him around with his bulky, 52-inch costume for trick-or-treating will be his 13-year-old brother, Shawn, who helped costruct the robot but will not be in costume himself. "One of the artists at the Torpedo Factory offered to paint his body gold so he could be a C3PO (R2-D2's companion robot in the movie), but he refused," says his mother.