Bridges and Tunnels: Investigate Feats of Engineering with 25 Projects (Build It Yourself)
This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases Bridges and tunnels are lifelinesPeople have tackled seemingly insurmountable obstacles, including vast canyons and mountain ranges, to design and construct these amazing passageways. Bridges and Tunnels: Investigate Feats of Engineering invites children ages 9 and up to explore the innovation and