The peace lily needs to be in a bigger pot. They are hard to keep alive. You might have to move it around in your home several times before you find a spot where it thrives.
The snake plant also needs to be repotted. They git top heavy. They do well most anyplace except in full sun. Don't give the much water.
The Aloe should be repotted as it grows. Just mist the leaves and very little water on the roots.
I don't anything about the palm.
The Aloe is not toxic. If you have heart burn or indigestion, you can break off a leaf, scrape the pulp out an swallow it, for fast relief. Warning, it tastes terrible. Noting will mess with the snake plant. Ignorant on the rest.
