Arrange graham crackers on a plate and cover with a dampened paper towel. Microwave 20 seconds to soften crackers. Cut one in half, then cut each piece into identical triangles. Trim remaining crackers into identical rectangles to form the roof (they should each be about 1/2 inch taller than the triangles).
Add several drops of red and blue food coloring to frosting until you reach the desired shade of lavender. Place several tablespoons of frosting in a zip-top bag and snip off a corner.
Pipe on frosting designs and attach candy decorations to each piece (don't forget a front door!). Let set.
Pipe frosting along the long edges of each triangle, then press roof pieces into place. Add the final decorations and let set. Arrange chalet on a small plate. Sprinkle with shredded coconut.