For a 4th birthday party we made a Toadstool fairy house cake.
We baked two chocolate chip sponge cakes, cut two circles out of the first one to make the trunk, and painstakingly carved the other into the dome-shaped roof.
We stuck the icing onto the sides with some buttercream. The doors and windows are quite simple designs cut out of icing that just took a bit of concentration to do.
The dots are icing circles stuck on top of the main piece, and the path is some scattered cake decorating stars. The fairy is a (non-edible) trinket/toy type thing.