LIQUID NITROGEN - Christian dips a carnation into a bowl of liquid nitrogen, pulls it out, and hits it against the table. The flower shatters into many tiny pieces as if it were made of glass. Mr.Wizard explains that the liquid is 290 degrees below zero Celsius. They both wear safety glasses. SWEATER REVERSING - Leila puts on a sweater and Mr. Wizard adds two pieces of tape to form an X on the front. Mr. Wizard ties a length of rope on her two wrists and challenges her to take the sweater off, turn it inside out and put it back on again. She doesn't think she can do it. The trick is based on the study of topology. WHAT IS THIS? - These are stiff spikes from the tips of a plant that looks like corn. By machine the spikes are processed, bundled together, trimmed, and a handle added. Can you tell what this is? ROBOT SENSOR - Mr Wizard starts a small three-wheel toy moving across the desk. He tells Darren to clap his hands. The toy turns in a different direction. It is a single?sensor robot that senses sound waves. They examine the various parts of the robot. FIREFIGHTER’S SCHOOL - These are students in a very unusual school. They're waiting in the shade because this is Texas in mid?summer where it can get very hot. But it will get even hotter for the students. SINGING GLASSES - Mr.Wizard shows Eugene how to create a sound by rubbing an index finger over the edge of a glass of water. POTATO FLOAT - Scott examines a pitcher that has half a potato floating near the center of a clear liquid. Mr. Wizard challenges him to duplicate it.moreless
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