Check out this blog post by Dughall McCormick (twitter @dughall ) http://dughall.com/?p=276
Dughall is an E-learning consultant for the local authority in Kirklees UK. He has been involved in a 3D printing project in primary schools. The students designed and made 3D models of (Olympic) stadiums. It’s obvious from the pictures in the blog that everyone involved had a brilliant day… And the quality of the designing by the year 4 students (8/9 year olds) is fantastic.