Day 3

We finished integrating the three point plates into the wall, and reinforced the wall using vertical bracing with lego beams:

Unfortunately, the wall still buckles at certain points. We plan on using cardboard to reinforce the structure, both in the front, and to provide extra support to the point plates in the back.

Once again, we have changed our design ideas. After experimenting with the propeller, we decided that it would be difficult to make it spin fast enough to blow bubbles. This idea is now on the back burner. As a replacement, the original candy-delivery car will be accompanied by two other cars, making one for each point square. One car would come out whenever someone hit a point square with a hackysack. (ie. if the point square A was hit, car A would come out; if point square B was jolted, car B would come out). The cars will have a mechanism to rotate the congratulatory signs as the vehicles approach the players.

Here are the cars we built:

We also made a score keeper. A small box, containing candy, will be transported by a geartrain at the top of the game board. When the point square is hit, a switch behind the target will be triggered. The depressed switch will trigger a motor which will start the geartrain. Where the box and geartrain stop will indicate the player's score. Although we have written the procedure for the score keeper, we have yet to determine for how long the geartrain motor must be on.

We have already scaled back our design considerably. When we started the project, we were planning on using either crickets and handyboards together, or two handyboards. However, we have now reduced the number of needed motors to only four. If we complete the current design, we will only need to use one handyboard.

In addition to the legos, we will need

  1. 1. Cardboard: this will be used to support the lego wall.
    2. A hackysack: the hackysack will be thrown at the point plates. It should be heavy enough to push the plate and the spring back, yet light
    enough to prevent the plate and spring from breaking.
    3. Construction paper, markers, etc. to make the structure aesthetically pleasing.