logo (thing)

A computer language used to teach structured computer programming. Its most prominent feature is turtle graphics - a system that allows children to get instant gratification from their programs. (Draw a circle in C++. how many lines did it take you?)
Its logical lisp-like structure is often overlooked by serious educators, unfortunately, since they assume, because of turtle graphics, that it is a toy.

Infinitely superior for structured programming education than Pascal or (shudder) BASIC.
Unfortunately, Smalltalk is probably a better choice for teaching Object Oriented Programming than Object Logo.