Share 'The Thumb! The Potty! HELP!'

Ok OS peeps, I need your help, two times! My 3 year old, Dani...my sensitive little drama queen. She's brilliant--really, turned 3 in December and is nearly ready for kindergarten milestone-wise.   Except for two things. The thumb. The potty.   She sucks her thumb; not all the time, but when she's tired, sleeping or upset.  The dentist says I need to try to curb this habit.  I've got a rule that…