Diagram-Four-77

Bridge And R.R. Tunnel

By cutting the ends or sides of boxes, tunnels or bridges may be made. Cut where the heavy black line indicates.

A.    The bridge is made by cutting a semicircle from the long sides of an inverted box. The box cover, turned upward, forms the bridge railing. At each end, cut the corners. A cardboard strip is pasted to each end rim to complete the bridge roadway.

B.    The tunnel is made by cutting a circular opening in the two ends of a deep box which has been inverted.