drop-offs late nights early mornings you wouldn't have it any other way but as they grow you can too gcu's online degree program puts you first so you can make the most of your time find your purpose at grand canyon university >>> welcome back. our next team up is the fire nin ninjas. they met in school and with us, our team leader, fifth grader, cara leah rankin. program lead fifth grader brandon chang. prototype build lead, fifth grader irene chen. and research lead fifth grader isaac chen, and bridge build lead and safety officer, fourth grader devon nkang. welcome to the show. thanks for being here. cara leah. give me an idea, this is the final product. give us a little demonstration and tell us how it works. crossing two ravines. >> yes, so what it does is when it starts, we have it turned, and then while it's rolling, we have the chop sticks in there to help it keep more traction, and then the grip pads on the top of it so it doesn't slide around. >> brandon, what kind of obstacles did you have to overcome to get to this? >> one of the biggest obstacles we had to overcome is when we