Let us suppose we have to set up a post office and delivery service at Edgemont Community Association. We have a plan to write letters and send them to all friends in neighborhood. To make everything as real as possible, we need to design some very spectacular stamps and weigh all the letters and finding out what stamps to put on.
How to make a Balance for the different range of weight? Kids are thinking/designing/building the balance they need. They also figure out the balance scale, how to use the unit to find out how many units we need to weigh letters up.
Tutor Paul
