A family is visiting a botanical garden. upon entry there is a large notice advising that "children must be accompanied by responsible adults at all time. No responsibility can be accepted for injury or damage suffered while on these premises".

during the trip, one of the children become separated from the family. The child finds a bush with red berries. In front of the bush is a small fence and a sign advising the berries are poisonous. The child steps over the barrier and becomes ill.

advise of the companies potential liability?