We used card, plastic, paper, tape, glue, corks, lollipop sticks, straws and many other materials to make our creations.
After we began testing them, we soon realised the larger the surface area of the boat the more weight it would hold: this is because the weight was distributed more evenly!
We then had to use our maths knowledge to total the weight that the boats held before they began to sink!
We also observed that the boats with more cardboard sank quicker as they absorbed the water and dragged the boat down. The ones with plastic on the bottom were able to float a lot longer as they were water resistant.