Begin by spray painting the houses brown. Apply two coats of spray paint, letting the houses dry at least 15 minutes in between coats. Then wait four hours for the paint to completely set before continuing.
Trace one of the houses on some paper, and use pencil to sketch in some designs. Having a plan is very helpful once you start on the actual house.
Shake the paint pen very well, then tap it down on the paper a few times to get the paint flowing. Practice using the paint pen on your paper first.
Then move on to adding designs to the front of your house. Begin by outlining the windows and doors, then start adding small, simple designs.
Continue filling in the space until you are happy with how it looks. Be careful not to smear what you've already done. Decorate the sides as well if desired.
Next, use puffy paint to add designs to the roof. Scallops or diagonal lines (to make diamond shapes) are popular.
Add extra puffy paint around the chimney and bottom edges/corners of the roof, then use a toothpick to pull it down to make it look like snow.
Allow the puffy paint to dry overnight before handling the houses.