Pennies represent how many soldiers the bridge can hold without collapsing.
48 Roman 'soldiers' fell into the river:
A straight bridge supported by arch/es, developed by Romans:
This arch-supported bridge held many more soldiers, along with chariots and horses
(dimes, nickels and quarters):
...even supported a giant pink pig with wings...
...which the kids found to be hilarious!
These smiles and laughters make it all worth it!