We've got Yamaha PSR-E453 keyboard. It allows mounting to a stand with screws. However, there are very few keyboard stands available that support this. Most keyboard stands are universal and you simply lay the keyboard on it, probably without mounting.
As our keyboard is placed in the children room, I'd prefer to fix it to the stand. Is this unusual? How am I supposed to fix a universal stand to the keyboard in order to prevent it from falling? If I drill holes to a stand, I would loose the possibility to adjust the keyboard height...