Sugar (desktop environment)
Sugar is a free and open-source desktop environment designed for interactive learning by children. It was developed by SugarLabs. Developed as part of the One Laptop per Child (OLPC) project, Sugar was the default interface on OLPC XO-1 laptop computers. The OLPC XO-1.5 and later provided the option of either the GNOME or Sugar interfaces.
Source: Wikipedia
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