In this episode of Zoom, the zoomers play a game called Dr. Pretzel, and Pablo shows us how to make music. He instructs us how to make a home-made rainstick. It's a musical instrument used in Africa and South America. Zoom's guest is a "small" oceanographer in the making. Nine year old Max, who lives on Long Island, is a volunteer with the Cornell Cooperative Extension Marine Center. He works with shell fish.