Make a stack of 10 pennies. Put your palm around them, to make sure that they are stacked evenly on top of each other.
Create a triad and carefully place it on top of the stack of ten pennies.
Place another triad on top of the previous triad. Continue adding triads until you get the height you want.
Repeat the above to build another bridge foundation, placing it close to the first foundation.
Connect the bridge by adding a penny at a time, on each end, leading up to center following the picture as a guide.
Expand on the bridge by starting over and putting an extra triad on top of each stack. This technique will create a bridge the width of 2 pennies, as seen in the photo.
Expand again to a 3 penny wide bridge. To do the penny bridge with a width of 3 pennies, do the same thing that you did for the 2 penny wide, except you put 3 pennies in the middle. With making the bridges with a larger span, put as many triads as there are pennies wide. Next, just fill up all the "spaces" between the triads, and keep going.
Finished.
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