Black nightshade, Solanum nigrum , is also to be avoided. The seeds of the Euonymous europeus are also poisonous to children. They are much larger and more attractive than are the seeds of the alatus. I have liked to extract the sweet nectar from the flowers of the Tartarian honeysuckle, Lonicera tatarica . This is done by pinching the calyx end and drawing the stamen through the flower, bringing with it a drop of nectar.
Some sources claim that the plant can be dangerous to children.
Mine were never harmed by the flower nectar, but they never had any significant quantity of it. There was only one small drop in each blossom. The leaves of the Caladium can burn the lips of children who chew on them. English ivy, Hedera helix , can cause contact dermatitis and don't eat the berries. Rhubarb and apple rhubarb pies are famously good.