That weak things can be made strong by strategic bending, folding, self-reinforcing methods.
Roll up a newspaper really tight, and it becomes a painful club to hit someone with... even though each individual sheet of that newspaper is flimsy.
The same is true with atoms and molecules, and a bunch of other things.
A marble can be supported by layering and bending paper, both the track and the vertical supports.
You have enough hints now. ;-)