In a sweet simulation, junior geneticists examine the chromosomes of a fictitious Reebop marshmallow animal, combine chromosomes to produce offspring, and then make a model of the resulting Reebop baby. Phenotypes include number of antennae, nose color, number of body segments, leg color, and more! The lesson even addresses X and Y chromosomes for the baby's gender. This memorable activity reinforces concepts of heredity and gives teens practice in using genetics language.