Have a student come to the front of the classroom and as a class, predict the length of his or her arms, legs or ears. Group students into groups of three and explain that each students should help to measure others and should measure himself or herself.
Give them a list of things to measure so they can record measurements. Be sure to include the length of the entire body! When finished, have them compare their measurements with others in the class.
They love to discuss this!
You can also download a PDF version of this game to file away for later here on my site or on TeachersPayTeachers.