My bridge can handle five pounds of pennies. I don't know if it can handle more because I didn't measure any further. My bridge is different from everyone else's because even though it is made out of cardboard, it has brown painted popsicle sticks to support the sides and keep it from crumbling. Also, on the underside there are shaped wooden bars to hold up and support the street. I learned that bridges aren't as easy to make as they look.
Bridges take a lot of concentration and ability to make, and firm, strong building materials.
If I had a chance to make a better bridge, I might make a better street with more modern technology such as traffic lights. But, it was a fun project. Bridges are fun. My name is Aldo. My first bridge, the one I am holding in the picture, can hold two hundred seventy paper clips.