This is what I like to call “chewlary”. My 10 year old is always chewing on things, his nails, bottle caps, pencils, you name it. A friend of ours introduced him to one of these and he FELL IN LOVE. He seriously has not taken it off (aside from letting me clean it lol). He especially likes to chew on this when he’s feeling anxious, and it’s helping him beat the habit of chewing on his nails! It’s 4 inches long and recommended for children 3 years old and up.