eureka bridge

Today we were making bridges that had to hold a plastic car and cross 40 centeirmeters and we had 100 dollars to spend on paper which was 3 dollars per piece and tape was 10 dollars for a 10 centimeter strip. This is our bridge, it held the car and was 1 meter long and costed 60 dollars.   

eureka catapult

 

Today we were making catapults out of popsicle sticks and rubber bands. this is mine that went 2.3 meters.