Two years ago, my sister gave me a ton of yarn. I did make one afghan with it!
But she also gave me a bunch of granny squares - some were already sewn together and some were just singular. I put them together in a "sort of" pattern and then put a border on them.
It came out pretty good! It didn't cost me a dime and it only took about six hours of my time last weekend!
Here is a picture of it folded up in quarters. It will cover a twin or full bed. I think I will give it to my son if he decides to buy a house.