Thing 4 came to tell me about the present he put together for his sister. It took a little creative questioning, but when I finally got the whole story, after I stopped laughing, I let Thing 2 know she should probably tone it down a bit.
It seems that Thing 4 went outside and talked a little with one of the contractors (also a neighbor, so it's all cool). He went to his truck and handed him a pair of orange foam earplugs. Contractor told Thing 4 to give them to his sister, so she wouldn't be bothered by him and yell at him so much.