This simple WikiHow explains how to convert a crappy, mass-produced pink dollhouse into a faerie house:

Collect materials for your home. They must be dry or the glue won't stick to them. For lap siding, you can use cat tail leaves. You can also make a stone cottage, or cover it with birch bark. Norway Pines have wonderful bark for shingles on the roof. Use old slips, fabric and lace for curtains. Layer them for a good effect. To detail the house, you might find some great shapes in potpourri, or from dried flowers from the garden. You can even make an entire faerie house with food!

Link (via Yokiddo)