Generally parents have known their children were gaining weight because they outgrew their clothes. Not all homes used to have bathroom scales to the extent they are common items in many homes now, so parents didn't know exactly how much their children weighed.
If there wasn't a scale in the home, the parents had the option of waiting for a visit to the doctor's office where the nurse had the patients stand on a scale before they were seen by the doctor. The lollipop scales, so named because of their shape, seen in most drug stores in earlier years was an inexpensive way to get weighed as were the fortune telling penny operated scales placed in various places such as movie theaters, grocery stores, and amusement parks.
At a farm store a youngster might have been given a chance to stand on a platform scale used for weighing bags of grain or boxes of other items, and no penny was needed. Some farm kids may remember this exercise of strength and the grimace on their father's face as he lifted the 1940's Hanson hanging scale up with the child clinging tightly to the rope tied onto the link at the bottom of the scale.
|Very simple outline of the scale my Dad used to weigh me.|
|White penny weight scale in front of Keystone Inn.|