Look at what I found in my plant pot - yellow mushrooms!
Details about them (from searching the web):
Name: Lepiota lutea or Leucocoprinus birnbaumii
Edible: No, they are poisonous.
Precaution: Although the mushrooms do not harm the plant in the pot, if there is a danger of small children or pets eating them accidentally, they need to be removed from the pot.
As I have neither in my household, I let the yellow mushrooms be.