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Lead
Within the late 1920’s, Nationwide Lead printed a e-book known as “The Dutch Boy’s Lead Party” which additionally promoted the usage of lead paint in schoolrooms and prompt that summer time was the most effective time to get faculty officers to have the varsity rooms repainted. Promoting lead paint utilizing kids even grew to become extra necessary after details about lead paint’s hazard to kids began to build up. Lead paint firms used kids of their advertising technique, to advertise the usage of lead paint typically public locations and for inside wall makes use of.
Zinc
This experiment was taken from Chemical Demonstration by Lee R. Summerlin and James L. Ealy, Jr., 1985, American Chemical Society, Washington, DC.