Here's a cute tutorial that's super quick if you have a compound miter saw. Ours is being loaned to us by my husband's parents while we build our coffee table, and I think I might get one since it's so handy! You can also use a jigsaw (as shown in this tutorial, which was my inspiration), but the compound miter saw will allow you to have exact angles ... just how I like them.
1-2x2 piece of lumber
Compound miter saw or jigsaw
Fine sand paper
1. Measure to the middle and make a mark at each end of the board. Draw a faint pencil line lengthwise down the center of the board.
2. Set your compound miter saw to a 45 degree angle. Place your board pencil line side down on the saw base and cut across the board near one of the ends.
3. Flip the board over. Find where the angle you just cut meets the pencil line on your board. Line up the saw and cut so the pencil line is at the peak of the little house's roof.
4. Set your saw back to a 0 degree angle and cut off the board however tall you'd like your houses (mine are approximately 1.5", 2", and 2.5" tall).
5. Sand sharp corners and pencil marks.
6. Paint the roof.