Here is the bridge Building Challenge. Students were given 50 straws and a roll of masking tape. They were challenged to build a strong, sturdy bridge that would span 15 cm. After the bridges were built we tested the strength with marbles. The strongest bridges held 100 marbles!
So much fun!
Here is the building challenge that tested the strength of different types of "joiners". Students were given straws and challenged to build three cubes. One cube was joined together with plasticine, one with pipe cleaner and one with paper clips. Once the cubes were built we tested their strength. We learned that the pipe cleaner joiners are the strongest! The paper clips are definitely the weakest!