Students discover optical illusions in this lesson that uses a red shamrock and white construction paper. Emphasis is placed upon inquiry, experiment, and then a short discussion on optical illusions and complimentary colors.

Middle schoolers use Tootsie-Roll Pops to become familiar with atoms and chemical formulas. They, in groups, find more combinations of Tootsie-Roll Pops than the other lab groups within 3 minutes (Round 1), and within 5 minutes (Round 2).