Child Safety Stove Knob Protectors - customizable

This is something I came up with to help keep small hands from turning the knobs on the stove. Either turning the burners on and burning down the house or turning the burners up and scorching dinner. The stove knobs are protected all around by a wall of plastic. The knob-protectors are linked together in groups of two to keep the child from rotating the protector around. This piece is held in place by the plastic nut behind the knob.

The piece is designed in OpenSCAD and is customizable.