Experience about 'Building Top' activity

I do this activity in school, when I do this project I just think about how to make a strong building to use paper, what ever the conclusion is our team didn't made it. I think it's very hard problem to make strong top to use little tiny paper. When my team member was change, I'm just little bit confused, and that moment I thought the another team members are lesser than our team member so I thought that was why our team member was change,  but suddenly a boy was join us our team ,so I thought something was going wrong, the good thing was a boy suggestion another opinion so it's little bit easier to make strong top. I think when teacher give more time our team was make really strong top in that project.