A.M.
Hi I have a 4 year old that is getting ready for kindergarden and I didnt want him to suck his thumb in school, he also has an overbite and a lisp from sucking his thumb. I got this nailpolish type stuff that is for nailbiters and thumbsuckers taht you paint on their nails and it tase very bitter. it worked in two days, he hasnt put his thumb in his mouth for over a month.