Young children are, it seems, placing themselves at risk in vehicles by undoing their safety harness buckles.
Numerous patents have been awarded for various fancy devices to screen young fingers from seatbelt release catches.
Today’s invention is simply to reuse the standard ‘childsafe’ medicine container design in this application. Access to the buckle release is limited to adults who can remove the cap, reach a finger inside and press the release button.
Although this would hinder to some extent the already tiresome process of loading children into a car, it’s also a cheap way to prevent serious accidents and thus worth considering.