I decided to take the time to design this as a Christmas gift for my stepmother, who is a math teacher. That would be why it is Christmas colored. After a day or three of hours put into designing it (and the case), I find out that Lego doesn't let you order your designs from their digital designer program anymore. So I count each piece by type and color (too much time invested to give up), and then go to order the parts through Lego's "Pick A Brick" program. The price was well over $1,000 which was not affordable for a jobless recent HS graduate. I checked 3d printing services about their prices to have the parts 3d printed, and I think it was an even higher cost due to their greediness. I'm sure it can be printed for under $100 easily, but I do not have a 3D printer sadly :/
Hopefully someone who has a 3D printer or a LOT of specific Legos, will find this instructable useful and save my time/efforts from being in vein :) A thing to take into thought before spending money on this: This hasn't been tested and I imagine all of the tolerance limitations legos have may cause it to not work. This is a concept design.
I didn't really want any springs, and hate when rubber bands are used in machines for long term use, so I designed it to work off gravity and it has to be standing up in order to work.
I didn't think of the entire thing, I just got the idea after learning how computers add numbers, and based the logic gate designs off of this guy's
Please point out typos and mistakes i've made. Kinda made this quickly.