Step 1: Materials
Markers or coloring stuff (completely optional)
Cardstock or other hard paper (you can use paper but it won't look that nice...)
IF YOU DO NOT USE THE HANDY TEMPLATE I GIVE YOU:
Download the handy template I have made for you!! You can just print it out and it's ready to go!
Step 2: Assembling the Squares
If the test line is not 3 inches, don't worry, it doesn't really matter as long as you don't mind it a little bigger or smaller.
First cut out a 3 by 3 cardstock square (make sure it's square) and fold it in half. Make two X's that fit EXACTLY on each half of the paper, leaving the crease you made earlier to divide the center of each of the squares.
Fold the square, folding it on each solid line.
Then, (if you want to) color each of the squares that roughly assembles the way I colored it. (big diamond in the middle, triangles on the side, etc.)
Repeat this process until you have 3 folded squares!
Step 3: Tape it all together
See the picture for a more detailed view! (notice how the ends form a diamond)
Tape all your squares together like this, then tape the ends together to make a tube! Also, tape the backs for extra safety!