Measure the length and the width of the room. Then figure the area of the room in square meters. For very long distances, have the students guestimate the distance between buildings. Then award prizes for the closest guess. Have students submit their guesses on strips of paper on which they have written their names.
Award prizes for the closest guesses.
Solicit volunteers to have their body temperatures taken. Have students read the Celsius room temperature and record it. Take a thermometer outside, allow time for the thermometer to adjust to the outside temperature, and record it. You might want to know the temperature and a thermometer is nowhere to be found. You hear crickets chirping around you.