They come with a magnetic wand which is used to remove discs from the bingo cards and store the discs between games. Placed on an overhead projector, these discs can model the subatomic particles in atoms. Use the yellow discs for neutrons, red for protons and blue for electrons. Disks can be quickly added or removed to create isotopes. Make a different isotope and ask students to identify your model.
Bingo discs can model molecules.
Two tangent blue discs represent the oxygen molecule. Use the two yellow discs and a blue disc to model the water molecule. Ask your students what change is needed to make the hydronium ion. The discs can be rearranged quickly, making modeling easy. The discs may be stacked to illustrate color absorption.