Historical Photos To Blow Your Mind: New Release!

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Baby cages were actually used by parents in the 1920s. They were made to ensure that children got enough sunlight and fresh air when living in apartment buildings. In the late 19th century the idea of “airing” your baby to promote health was popular, and it was introduced in 1894 by Dr. Luther Emmett Holt in his book The Care and Feeding of Children.

“Fresh air is required to renew and purify the blood, and it this is just as necessary for health and growth as proper food,” he wrote. So, if you’ve ever wondered why your parents always insisted you go outside and “get some fresh air,” it might have roots in this early parenting book.