Simplicity

I am a teenager, and I don't have a lot of money to spend. I think that's a thing 99% of all the teenagers can agree with (or you must have some really rich parents).
I do like decorations, though, and I spend a lot of time in my room, so I want my room to be nice and cosy. Oh, and I love tulips. How do I combine those factors?
Just use an empty bottle which used to contain beer, stick one single tulip in it and place it on an empty desk. Simple cosiness - I love it.

It creates some nice shadows too.