Dangerous amounts can often be found in PVC toys and vinyl toys, raincoats, backpacks and window blinds . Even a very small amount of lead can lead to reduced intelligence, especially in very small children who often chew and swallow lead particles from common toys or even chew on electrical cables. It has happened that KFC, Toys R Us, Disney and Warner Brothers has distributed such toys and other products according to a Green peace investigation . However Greenpeace is not very trustworthy according to many articles. It could be that Greenpeace are right, but it could also be that they want to confuse the public which makes the whole thing even more scary.
Fact remains if it is easy to avoid it, try to avoid it.
At least until we know more Organic Lead from plants is not poisonous. Planting herbs, sunflowers etc. Small children use their mouth to measure the size of objects. You cannot forbid a small child to do this. It is only natural.