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Solvers were presented with a molecular model kit made out of colored marshmallows. It contains 8 carbons (black), 4 nitrogens (blue), 2 oxygens (red), and 10 hydrogens (white), using canonical colors for the elements. Also included are ‘bonds’ (toothpicks) and a text insert.

The hydrogen atoms were unlabeled and had short unlabeled bond pieces already attached to them. The other atoms were labeled with small organic molecules, and the bonds were labeled with an arrow and reaction conditions. A paper kit can be downloaded here.