Alternative Energy Products

What can I put near my window (a desk, etc) to that makes use of the window?

I want something to be in front of the window in my room that makes use of it. Like something that I would be better in front of the window than against another wall. Please don't say plants. Thank you.

a fly screen is good. or a church. or even a chimney. what about a car? a fast car with 2 engines that fly. or a dog house with an umbrella ontop just incase it rains. or a helicopter. u can get a cheap helicopter from a used car dealer, if u go in late. like donuts. donuts are always cheaper at the end of the day... heyyyyy what about a donut, put a donut infront of it.