Practically since birth Chloe has been a thumb sucker. We tried to give her a dummy (numerous times) but she kept spitting it out in favour of the thumb. As you can see everything was done with the thumb in mouth.
We have unsuccessfully tried the break the habbit in the past with the terrible tasting nail biting stuff (which she hated) and we were going okay (until Sarah was born).
When she turned 3 and became a 'big girl' we felt we REALLY had to get the thumb sucking sorted before it continued any further so we dedicated a Family Home Evening to helping her break the habit. We needed to set a goal with a reward to work toward and decided that 25 days might be a reasonable time to break the habbit.
With Chloe by my side we made a chart and she chose the counters to mark each successful day and later we all headed off to KMart were she was able to pick ANY toy she wanted (Far cheaper than the cost of braces if we can stop it now ;p ) so after making her go up and down EVERY toy isle (such a difficult task for a toddler - yeah right! ) she decided on a princess bike/trike. Then it was off to coles to buy the treats (Cars eggs) that would help to keep her motivated on her way to getting the bike. I also made her a glove from old fleece (really a sock with ribbon at the top that I could tie at her wrist) that I would put on her to help her remember - she hates it!!!
So far she has done incredibly well the first two days the 'remembering' glove was used if I saw her tumb go inter her mouth with a gentle reminder that "we are trying to help you remember so you can get your special toy". We did also give about three treats in the first five days rather than the one to keep her motivated and feel that the end goal would be achievable. Now we are almost through the chart and she is set to get her bike on Tuesday (all going well). Then we will see if she has broken the habit or will need to continue her chart for another 25 days.
What have you tried to break your childrens bad habits? I would love to know what you have found works because I am pretty sure I will have to do it again when Sarah is older (She has also started to suck her thumb and not the dummy) and if the chart doesn't work for her I will need some back-up ideas!