MAVALA Stop for Nail Biting and Thumb SuckingThis stuff really works! Our orthodontist told us to try this first before we had a habit device put in our daughters mouth. He said in 98% of the patients he told about Mavala Stop, it worked and their would be no need for an expensive device for the thumb sucking. He was correct! Within two weeks time she was done thumb sucking and has not gone back to it (she had just turned 7 and sucked her thumb all the time, accept in school, and it has been 6 or 7 months now).Thank-you.