let's be honest here, we're talking about toddlers. They put everything in their mouths. So, whats worse, them sticking god knows what in their mouths or a their nails? Kids will be kids, i think theres a lot more to worry about then nail polish. Chemicals are everywhere, just have a look at those fishy crackers you give your kids on a day to day basis, or the container in which those precious vitamins come in. All your child's bedding, including crib bedding in Canada is doused in a flame retardant. So....like i said before, there are plenty more things to worry about than nail polish. Not only that, they love it, they have a good time and it makes them smile. let kids be kids for crying out loud. And oh btw, for all those germ freaked out parents, mud is a good thing. Free play is a good thing, trust me, i'm an educator.