My very risky boat design. By Mayumi

We are doing a 'build a boat project.' The boat is made of tape, straws, papercups, and plastic wrap. The goal is for the boat to withstand the weight of 20 coin like objects on water. My design is a cup cut in half, with straws taped to the bottom, the tape is also covering the holes in the straws to create little air pockets for the boat to float. I then add another layer on cup-cut-in-half, and tape it together, then cover the entire boat with plastic wrap to preserve the air pockets that may have formed. That's it! Will the many layers weigh down the boat enough for it to sink? What do you think?

So it worked!!! It was bouyant, because of all the straws I used. Maybe not 100% stable, as I noticed it was starting to tilt near the end. I didnt tape the straws evenly on both sides of the boat, same with the second layer of cup, so maybe thats it. It was certainly waterproof, due to the layers of plastic wrap and tape that practically drowned me boat design.