How big is a mole? If your students have difficulty visualizing 22.4 L of gas, you can use these specially designed balloons to show students what a mole looks like. The balloons are color-coded, allowing students to work individually or in groups to compare the mass and number of molecules in moles of various gases. The supplied guide has instructions for chemical reaction and mole conversion activities, and a mole comparison demonstration. The balloons feature the definition of a mole and an eye-catching logo to help students have fun while learning about chemistry. Developed by John Bros. Includes matrerials for 30 students and teacher’s guide with complete instructions. Grades 10–12.