And I ended up separating the blocks and laying them individually.
So on the second side I cut the mats a bit shorter and connected all of them together. Then, I used the hot glue gun to reinforce the mat.
This time I put down the whole mat at once. I added tape in spots I noticed were weak, but I think this side looks better.
I have heavy objects on the mats in hopes they will help them stick. They won't stay there. Sol already loves Azaria's bowls and tub of toys. Of course her toys are cooler because they aren't allowed for Sol!
The real test will be when Sol tries getting up on the fireplace again.
By the way, I am, by no means, encouraging him to get on the fireplace-but I want to supervise and discourage activity and hopefully not have to spend $150+ to get a gate around the entire fireplace. We will see!
In the meantime, David is working on the staircase....safety proof safety proof!