DIY Nativity Stable ~ IT FOLDS FLAT!

We built a stable for our outdoor nativity! Check out this video for step by step instructions so you can make one too! It took us about 3 hours once we got all the materials.
Supplies List:
Eleven picket boards 1" x 5.5" x 6'
Four 1" x 4" x 6' boards
Six 4" or 6" gate hinges
Box of 1.5" wood nails
Tools:
Miter saw
Measuring tape
Hammer
Set square ruler
Sharpie
Drill
Safety glasses
Cut List:
1. 7 picket boards cut 33" from the bottom flat edge
2. 7 picket boards cut 24" from the top 'rounded' edge
3. Place four boards side by side. Measure 33" from bottom of
the first board. Then 38" from bottom of the last board. Use a straight edge to draw a diagonal line. After you cut off the rounded edge it'll measure 33"-38" tall from both directions. (for two walls)