<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:10pt"><div>It's a different part of the brain that works when doing 3D. To exercise that part of the brain in young students, I've used Lego Digital Designer (or MLCAD), Google Sketchup and Blender. I only use open source so my students from 4th grade to college, can do their homework.</div> </div></body></html>