I'm sorry folks but a ppruner posted a request for some drawing software for a 10 Year old child to experiment with a few days back.
By chance if you are using a Mac or Ubunto theres an excellent package called GeoGebra its free.
Find it here
GeoGebra - Software Publisher Profile - CNET Download.com
Its Maths orientated but very easy to use. Its only 2D
CAT III