I'm looking for a packaging/storage solution/design/idea.
This packaging/storage solution must be child-proof, which means it is difficult for a 5-year old child to open.
The package could be made of metal, glass, silicone or plastic.
It could be a box in the shape of rectangle or square, and could be a jar with lid, or in any shape you think it reasonable.
All ideas are welcome and paid if we think it is really a child-proof one.