LOGO

A powerful programming language built to be easy for children to use. LOGO is essentially a dialect of LISP without the parentheses that traditional LISP requires. It has been implemented in many versions including Brian Harvey's UCBLogo and the multimedia authoring toolkit called Hyperstudio.

There are lessons to be learned in all of these systems if OLPC application developers wish to stand on the shoulders of giants rather than reinvent the wheel over and over again.