Who knows what kinds of small backyard toadstools are safe & will grow?

In a shady area of my backyard, I discovered a section of very small toadstools or mushrooms (wild) that were growing underneath some indigenous weeds (mostly spreading dandelions). They were in miniature groupings, and very cute-looking! I put some delicately into a pot with some of the same soil, but not sure which is safe for growing as-a-hobby indoors for little pots, dishes, or terrariums. Any suggestions or warnings?