Our 6th meeting was on February 28th. We had a cool idea to make tiny buildings made out of jenga looking pieces to make it look like our machine ran through a city. It took us about 10 minutes to build the whole cityscape. Then we said we should test it until we get the final run. We recorded every try form then and also got one of our members moms to record a different angle of the final run when it happened. And we also took before and after photos of the cup at the end to show that the cabbage juice color changed. When we got the clips and photos after the final run we uploaded all the clips we needed. Then my job was to make the video over the weekend. Yeah (sarcastically)

This the video:

Our 5th meting was on February 26th we kept testing the new marble step. And we had some troubles with it. But we kept testing it and testing it but we decided it was to unpredictable so we took it out. I guess I got my way. Also one of our group members showed us a really cool trick you could do with some baking soda lemon juice and purple cabbage juice. It is called and acid base reaction, when you mix the lemon juice with the cabbage juice the juice turns pink. But if you add the baking soda instead of the lemon juice the cabbage juice turns blue. We decided to make that our new final product. But baking soda in the cabbage juice. We chose the baking soda over the lemon juice because it is easier to contain because it is not a liquid. We also tested using a nerf gun to make the ping pong ball go ate the beginning. But the gun we used was to powerful so we used a softer gun but it was to soft so we decided to scrap the idea. In the next meting we hope to film the final run.

We had our 4th meeting on February 13th. We wanted to add another step because we thought we didn’t have enough. We decided to add a marble track right before the reverse ramp step. The reverse ramp is a step where a track is balancing on a domino but one side is heavier. But we add a domino at the end of the lighter side of the ramp so that side becomes heavier. Then when the ball hits the domino the domino falls of the ramp. Because the domino is not there anymore the other side is heavier and it tilts the other way. But because we added a marble track at the end of it we would have to have so way of triggering the ping pong ball to go onto the reverse ramp. So at the end of the track we added a ramp that was holding itself from the marble track. But we added a little ridge on the ramp to keep the ping pong ball from going. So what was supposed to happen was that the marble hits the ping pong ball on to the track, but the ramp was the close the the exit that the marble could not come out. But the vibration from the marble hitting the ramp ended up moving the ping pong ball anyway. By the end of the meting I wasn’t very satisfied about the new step but I decided to role with it anyway.

We had our second meeting was February 4th. We tested each step from the sketch. Some of the steps worked well and some didn’t. The steps that didn’t work so well we changed and modified so they would work. One thing that didn’t work was a system the pulled a domino out from in front of a car, it didn’t work because the domino didn’t stay on so we taped it, But the tape was to strong so we made the wait t pull it off heavier. We made some breakthroughs but we also had some fails. We made some changes to the sketch based on the information we got by testing the steps. Like we saw that a track worked better than a tube( Because we didn’t have a tube ). And a ping pong ball worked better than a car because the car would have to hit a ping pong ball and because of the next step it was unpredictable so we used a ping pong ball. There are still many thing we must change to have the best possible machine. But it will take a loner time than we have already had. Like I said before there are still many steps to go. And we hope we can keep going and never give up.