This was just what I was looking for! I have a little girl (almost 3) who sucks her thumb at bedtime. So much so that she was causing them to become very sore. I had tried plasters and thumbsies - both of which she would fall asleep with on but then take off if she woke during the night. With these, the first night she was a bit angry as she couldn’t take it off (as I put it on beneath her short sleeve pyjama top) but then second, third night onwards she became used to it and now happily wears them. She now brings her “special sleeves” to me to put on her before bed. Here’s hoping we finally nip the thumb sucking in the bud ??