I was at the LFS in AMK(Mermaid), and saw that there are some interesting moss for sale. One of them is called Mini Weeping Moss. It looks similar to the weeping moss, but it is much smaller in size. Something like comparing normal riccia and mini riccia.

The other is the Stringy Moss. Looks cool.

Oh, there is also a type of liverwort, the owner told me it's mini pellia.

Seems like now plants like to exist in different sizes.