I have a 4, 2.5 and 10 month old and I can relate to your problem. My two older girls were very good about not touching the speakers, the wires etc. However, I have Krell 650mono's and the heat sinks are a weapon and my fear is they will fall and hit their heads on a heat sink and split it wide open. My ten month old is crawling now and he is trying to tear the foam off my Wilson speakers and pull on the speaker cables and interconnects.
To avoid my kids from falling and hitting their heads on the amps and avoid my son from getting too close to the amps, we have put one of those plastic fences around the amps so they can't get near them and for the interconnects and speaker cable we have covered them up with throw rugs so they can't see them to pull.
With time and coaching against touching, I am hoping I can get rid of the protection. When I am listening, I do move the fence out of the way.
Good luck.
To avoid my kids from falling and hitting their heads on the amps and avoid my son from getting too close to the amps, we have put one of those plastic fences around the amps so they can't get near them and for the interconnects and speaker cable we have covered them up with throw rugs so they can't see them to pull.
With time and coaching against touching, I am hoping I can get rid of the protection. When I am listening, I do move the fence out of the way.
Good luck.