Sugar
Sugar is the desktop environment component of a worldwide effort to provide every child with an equal opportunity for a quality education. Available in more than twenty-five languages, Sugar Activities are used every school day by children in more than forty countries.
Originally developed for the One Laptop per Child XO-1 netbook, Sugar can run on most computers.
Sugar is free/libre and open-source software.
Installing on Debian or Ubuntu
sudo apt install sucrose
Then log out, and log in with the Sugar desktop selected.
Installing on Fedora
sudo dnf groupinstall sugar-desktop
Then restart your computer. At the Sign in select the Sugar desktop.
See also Fedora.
Building
Sugar follows the GNU Coding Standards.
Install all dependencies, especially sugar-artwork, sugar-datastore,
and sugar-toolkit-gtk3.
Clone the repository, run autogen.sh, then make and make install.
See also Setup a development environment.