I'll have to remember that! I feel dumb, I have seen them but I think I always thought they were for biting, and then wondered "isn't that a choking hazard?"
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So today Abbey was doing something and I asked her if she was ready for her bath. She ignored me, so I said "Can you put on your listening ears?" She did what she always does, this little twisting motion near her ears and then looked at me expectantly. I asked again and she said "Yes" then she did the twisting motion again. I asked her "What are you doing?" and she said "Taking off my listening ears." lol. Because she wouldn't want to accidentally listen to me all the time.