1967 by Canadian paediatrician Dr. Henri Breault.
most of them are but there are really smart kids that knows how to open such containers.
a medication bottle
Colin Murdoch from New Zealand
it depends on the container and the factory its made in
they work up into a certain age
dr.henri
Metal
Basic plastic containers with plastic lids are lightweight, child safe, and useful for storage. These containers can be found at your local Target or Walmart stores.
Inheritance blocking
Mr.Tupper invented the Tupperware plastic containers Written by :BMX Live
The childproof conatiners were invented by Dr. Henri Brealt (1909-1983)