19 Edible Kitchen Science Experiment! Awesome list of science projects kids can make and eat too. Great list for summer for Preschool, Kindergarten, 1st grade, 2nd grade, and 3rd-6th grade elementary students.
Gallium- It has a melting temperature of about 85 degrees Fahrenheit, which is basically room temperature. If you hold this metal it will begin to melt in your hand.