1st pic has the same plant from the last post, showing the caterpillar under the leaves. 3rd plant has thin green stem, short - knee high, with red berries. 4th plant seems like a vine, climbing on my Hibiscus plants in the background, with small green berries that turn dusky light blue. I am concerned about any that are poisonous to children. Thank you!
The first two are in the Nightshade family. Many plants in that family are toxic, some, like Tomatoes, are healthy and delicious.