Haha thank you!
And you can do whatever, that's the brilliant thing about it! I tied mine down in that tank with fishing line. eventually the moss will grow into the wood and you can remove the fishing line, although you really can't see it so I never bother removing it.
I also left the same bunch of moss floating in my ten gallon for months on end before I had to move it to Rory's last minute improvised tank ^_^
You can actually just stick it in the sand (or gravel) and try to grow a messy carpet out of it
You can also do a moss wall
You should look them up, they look really neat!
Java moss (maybe moss in general, but I have only had java) is awesome. It is SO durable and you can do whatever you want with it!