Learning about rocks couldn’t be more fun! Colorful, soft 24" inflatable vinyl ball provides an excellent way for students to improve their knowledge of rocks. Here is how you play—the teacher tosses the ball to a student. The student answers the question found under his left thumb and then tosses the ball to another classmate. The next question is answered in the same manner and the game continues. A great interactive classroom activity! Contains more than 100 questions about different types of rocks and how rocks form. Includes game-play directions and answer sheet.