We know enough to lock up the Tylenol and rat poison and keep the kids away from antifreeze - but too many conscientious parents don't realise just how hazardous the house and close environs can be to kids. For example: the bulb of the daffodil is poisonous, the water in a vase of lilies of the valley can be deadly, certain caterpillars in the northeast can deliver a debilitating sting, poison ivy can remain active in the body for 30 years etc. In total there are more than 70 poisons - from medicines, plants, creatures, and nature's foods - that are harmful.