I did the same thing when I had Watt Puppies with child gates,
The only child proof speakers are electrostats as the drivers are protected by stators which are usually stamped from metal.
The only issue then becomes the panels may look really attractive to getting small objects pushed into them.
I would recommend the new Janszen ZA 2.1 unfortunately they cost $7.5k but the sound quality is amazing! I just got a pair and in many ways they sound more like $15-20k, they are very sturdy and nearly indestructible, and the drivers are nicely hidden by non removable grills so there is no chance of little hands mashing up drivers.
Call up Janszen and see if you can get a pair to hear they are really remarkable speakers.