### Step 3: Dry-fit the frame

Before you apply the glue and assemble the goal permanently, you will need to dry-fit the pieces together. This will ensure that the sections of pipe fit together correctly and the goal is straight and true.

Begin with the base. Make the two corners by attaching a 1-foot section to a 3-foot section, using an elbow. Lay these down facing each other. Put tees on the other ends of the 1-foot sections. Then connect the two tees with a 3-foot section.

To make the top of the goal, repeat the steps above, except attach the 1-foot sections to 4-foot sections at the elbows.

Attach elbows to the short sides of the base, and turn them so that they face upward. Stand the top of the goal up, and insert the bottom of the 4-foot sections into the elbows. You should now have an L-shaped frame.

Finally, connect the top and base tees with 5-foot sections that act as brace pieces.

To parents: Use the side of the goal to teach older kids about right triangles and the Pythagorean theorem: a2 + b2 = c2. The base side is a (3 feet), the vertical side is b (4 feet), and the brace piece is the hypotenuse, or c (5 feet).
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#### Shopping List

1. Four 10-foot lengths of 1¼ PVC tubing

2. Six 1¼-inch PVC elbows

3. Four 1¼-inch PVC tees 4. 80-grit sandpaper

5. PVC pipe cement
(preferably a low-VOC formula that's labeled all-weather) 6. Deer netting

7. Five dozen zip ties

8. Small sand bags
(optional: to hold down the goal when you play)