When designing you may want to consider the following:

• How people with different needs will get onto and off the buggy
• How people will travel on the buggy (sit, stand...)
• How people will see out of the buggy
• If your buggy will fit on the bridge and move across it easily
• How your buggy will get onto the bridge; do you need to think about getting up a slope?
• What weight the bridge will hold.

To test the buggy and bridge combination, the buggy must carry a bag of sand to represent the weight of the driver and passengers. You can decide on the weight with your partner school.

Good Luck!

An example of what your bridge might look like

Allowable Construction Materials: Card Battery Holders (AA) Paper Switches Drinking/Art straws Dowel Correx/Foamboard Lolly sticks/ tongue depressors 3v electric motors Wooden/Plastic/Foam Wheels Plastic pulleys/gears Suitable joiners/adhesives Motor clips - The Bridge The test bed for your bridge could look like the diagram above. You may need to make adjustments if you are taking measurements from, and using, a river in your locality. You will have to work closely with your partner school to make sure your bridge is strong enough to take their buggy and their buggy will fit over your bridge! Your design could: Have a maximum width  of 30cm Be self contained with no supports fixed to the sides of the gap Cross the river in a single span with  no supports down to the river bed You need to clarify the brief with your partner school before you start. To test the buggy and bridge combination, the buggy must carry a bag of sand to represent the weight of the driver and passengers. You can decide on the weight with your partner school. Download the design spec document here