J.L.
Hi S., I agree being a SAHM is the best job ever. I't is very natural for your daughter to put stuff in her mouth, but sinse this was not part of her charactor she probabbly is getting it from the other kids, and sinse she sees no discipline from the other mother, she probably thinks it's OK.
Time out sweetie really does not work for most things and most children, 3 is a little old to still be putting everything in their mouth. Just try and keep an eye on her, if she is out side and puts stuf in her mounth firmly tell her get that out of your mouth, if she obeys great if not, make her go in the house, if she puts crayons in her mouth, take them away, untill she stops putting them in her mouth. I have to tell you I ate crayons all through elementry school. Maybe if your friend see's you discipline your daughter for putting things in her mouth, maybe she will get th message and do the same thing, Chocking is a concern, but also the white canker sores kids get in their mouths, those are paimful. Just be firm but loving, and keep small objects out of her reach, the bst that you can. let me know ho she does. J. L.