Molymod Molecule Model - Differentiating Similarly-Sized Atoms

Many thanks to Michael Deolloz for this idea.

When building Molymod models to build biomolecules,  the carbon and oxygen atoms are of similar size and will be difficult for students with visual impairment to distinguish.  For this reason, a simple adaptation is to add a small tactile dot to each carbon atom in the molecule. Bumpons or velcro works well for this adaptation.

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