A beam bridge is made from a combination of metal and the geometric shapes of squares and triangles. The triangles fit together and press on each other to hold the bridges shape. Craft sticks or Popsicle sticks are easily shaped into both geometric shapes. The triangles are placed side by side to create the sides of the bridge. Squares are used to create the bottom of the bridge. White school glue holds the Popsicle sticks together to make a solid bond.
Make 10 triangles from 30 Popsicle sticks. Use three sticks per triangle. Glue the ends together to form a triangle. Set aside and let dry for 30 minutes.
Make five squares from 20 Popsicle sticks. Glue the ends of four Popsicle sticks together to form each square. Set aside and let dry for 30 minutes.
Make two triangles from six of the Popsicle squares. Stand the squares on edge. Glue along the long edge of the three squares to hold them together. Brace if needed. Allow the large triangles to dry for 30 minutes.
Make the sides of the bridge using five flat triangles per side. Place the first triangle so a flat side is pointing down and a point is pointing up. Place a triangle on both sides of the first with the point facing down and the flat side facing up. Add the last two triangles by putting the flat side down and the point up. Make sure all five triangles are touching. Glue down the area where they touch. Repeat the process for the second side. Allow the sides to dry for 30 minutes
Place the single square on the table so a flat side is down. Place the squares made into triangles next to the flat square. Place one on each side of the flat square. Make sure the edges of the sticks are touching. Place a line of glue down each seam. Allow the bottom of the bridge to dry for 30 minutes. The bridge is currently positioned so the top of the bridge is on the table surface.
Turn the bottom of the bridge on its side so the two points of the triangles are pointing toward you. Place one of the sides on the table and line it up with the edge of the bridge. Make sure the bridge side and bottom are touching. Place a line of glue along the seam. Allow the glue to dry for 30 minutes. Repeat the process with the second side.
Sit the bridge up so the bottom of the bridge is sitting on the points of the triangles made from the squares. Lay a single Popsicle stick across the bridge at each triangle point. There are three points that face up on each side. Glue the sticks into place. Allow to dry for 30 minutes. These three sticks will help support the sides and prevent them from falling off the bridge.