We held a summer camp for 7-13 year olds and used the Afinia 3D printer for the first time. The kids designed in Tinkercad and then saw their small (very small) models printed out. They took them home on Fridays. The camps were one week and the designs had to be finished by Wednesday 12 noon. 30 campers each week. We could print on Wednesday, Thursday and Friday morning and have things ready to go on by Friday at 12noon. The students learned measurements, density, overhangs, rafting, support, and some basic design principals. They loved it. A few of the kids advanced to using Autodesk Inventor. That was unexpected, but our facilitators wanted to keep all the kids engaged and challenged and the campers got the hang of some basic principles in inventor. I guess it depends on the nature of the teachers. If they are willing to let the kids explore, then I say go for it.