A LITTLE "FUN"GI
Mushrooms are very cool organisms. In my opinion. They grow in places we find quite undesirable (like manure). They also look alien.
Never did I know of a beautiful mushroom outside of Alice in Wonderland. Sometimes, over the last couple of decades since I have had houseplants, I discovered Leucocoprinus birnbaumii, also called lepiota lutea growing in the soil of some of my plants. The beautiful bright yellow fungi are small, and never last long. I shamelessly pilfered this photo from Wikipedia; I have none of my own for this shroom.
It doesn't harm the plants, but don't eat it. It's unknown whether it's poisonous. Jut enjoy its beauty. Oh, the common name is yellow houseplant mushroom. Here are a couple of links with more information about it: