Last updated at 10:45 pm UTC on 10 April 2008
Plopp is a commercial product by impara for letting kids create 3d objects by sketching them. The Linux version is free (as in beer), Mac and Windows versions can be purchased on its website.
It is implemented entirely in Squeak using Tweak for its UI and Croquet for the 3D rendering.
Plopp won 1st place in the ESUG 2006 Innovation Technology Awards: