Key holder for wooden door frame / Holzzargen Schlüsselhalter

Our door keys are laying on our wooden door frame. So my 2.5 year old son can´t lock the door on his own. But one day it happens the one key is falling down and he locked the door but is not able to open it again. Luckily the key of another door is the same and we get the door open. So I came with this idee. There ist a small gap beetween the door frame and the wall. Everything is customizeable with OpenSCAD.