How about using coir from those hanging wire baskets as a roof. I think the dollar store sells the coir without the wire pots.

Here is a link that might be useful: Thatch roof fairy garden house

Here is one with instructions.

Here is a link that might be useful: Thatch

You can make one out of wood if you have some pieces laying around...if it's a rectangular shaped cookie jar, just measure and make a triangle or pyramid shaped room to sit on top. You could either paint the roof, use moss, or some tin or even bark to cover it.

Let us see what you come up with...we love pictures!

I found some fairies at the thrift store today. They need painting and one has a broken off arm. I am so excited that everything is coming together and am going to start working on a top for their house. I will investigate doing the picture thing but am very technically challenged.

If you are challenged the cutting a piece of fiber would really be your best technique. That is just cutting and gluing. No wood cutting and it is realistic to what a fairy house would have as a roof.

Good luck and have fun. By the way...... I would not stress about the arm put a flower or some moss around the arm part and no one will see the difference. Just start improvising and fix things as you go. Maybe you will stumble up on a little doll in the dollar store or in the thrift store and you can fix it later.