Build was very hard. We learned a lot of things and information. We did end up modifying our design because of problems.

One problem we had was the car wasn’t hitting the dominoes. Our ramp was pretty wide so the car moved all over the place. With the help our mom, Alina and I found a solution. We made a narrower ramp and put books on both sides of the dominoes to make sure it would only hit the dominoes.

Something I thought would be very hard was the lever. First of all, we didn’t know where to get the lever. My dad and I did some searching and found one. When we got it was pretty small and it took some time to assemble. I thought it was to Small but it wasn’t. We did have a problem with the lever moving but we were able to fix that.