babys and your components

Many of us have or had small children for example bellow 2 yo

They're in general free to do anything and can make themselves harm crowling onto the bunch of wires or touching naked tubes. They can also bite knobs, move movable components and so on...

My son is about to crawl and He will be visiting living room with my equipment quite often. I am not worried about my equipment pretty much since He won't be able to move even a single component -- too heavy. I worry about power cords, interconnects that are in the rear of my equipment stand. I worry about naked tubes on the mono amplifiers. I worry about speakers since thay can fall down when pushed.
On the other hand, I cannot limit Him to be in carriage or stroller or in bed while he's awake -- He has to walk and crawl.

It's not often the issue to keep separate room for that purpuoses(I've never seen that in my life). Most likely no matter how big or how many rooms is in your space, there is a wife in the family that will want to have it.

How do you manage this problem? What do you do to avoid accidents with babys?