Turtle robots are closely associated with the work of Seymour Papert and the common use of the Logo programming language in computer education of the 1980s. Turtles specifically designed for use with Logo systems often come with pen mechanisms allowing the programmer to create a design on a large sheet of paper. The original Logo turtle, built by Paul Wexelblat at BBN, was named "Irving" and was demonstrated at the former Muzzey Junior High in Lexington, Massachusetts. "Irving" contained bump sensors and could give audio feedback with a bell. The development of the robotic Logo turtle led to the use of the term to describe the cursor in video screen implementations of the language and its turtle graphics package.