Cut 10 graham crackers in half to make 20 squares.

Cut four of the squares diagonally in half to make eight triangles.

Empty vanilla frosting into a large bowl.

Gradually beat in confectioners' sugar until smooth.

Cut a small hole in the tip of a pastry bag or plastic bag; insert a #4 round pastry tip.

Fill the pastry bag two-thirds full with the frosting mixture.

For each roof, pipe a strip of frosting along three edges of two graham cracker squares.

Pipe a strip of frosting along the short edges of two graham cracker triangles.

Hold the triangles upright with unfrosted edges at the bottom.

Place the squares on top of the triangles, lining up edges to make a sloped roof.

Let the roofs stand for 1 hour to set.

For each short house, pipe frosting on two opposite edges of four graham cracker squares.

Join the frosted edges to form walls.

For each tall house, pipe frosting on the long edges of four graham cracker rectangles.

Join the frosted edges to form walls.

Cut the remaining graham cracker to make four doors.

Attach the doors to the houses with frosting.

Pipe a thin strip of frosting along the bottoms of the roofs.

Place the roofs on the walls of the houses.

Decorate the houses as desired with assorted candies and cookies.

Let the decorated houses stand for 2 hours or until set.