Felix 1.0 3D printer
Felix is the IMHO the most practical printer for schools, since it can be easily carried around and since it has a very stable frame
Assembly of the current model, however, requires some soldering skills. Assembly seems to take about 5 to 12 hours depending on your DYI skills.
I managed to order an assembled version, probably since I am known to help with documentation, but the printer fell off a truck or something and arrived broken. Negotiations are underway with the Post Office...
Soon I'll have it repaired I hope - Daniel K. Schneider April 2012