hmmm never heard of eureka. i just checked it out and looks perfect to teach my 10 year old with. i had him try tinkercad. i hate it and so does he. maybe ill try it out to see if its good for him. i was going to teach him rhino because i know it well but i think at 10 its just slightly over his head. at 12-13 he could prob handle it. thanks for the link mike!