How to show the structure of some carbon structures to pupils? One option is to use 3D printed model :-). This set includes: nanotube(6,6), nanotube(8,3), nanotube(10,0), fullerene C60, graphene.
The models carbon diameter is 10 mm (the size is "compatible" with this molecular set: https://www.thingiverse.com/thing:2251404). This makes it possible to compare different structures (molecules).
In the filese there are also models in molecular PDB format (for direct viewing on tablets, smart phones, computers - in molecular viewers like iMolview).
More educational 3D models can be found also on our website http://www.e-mole.cz/3d-model.