3-Bit Binary Calculator Using Integrated Circuits

This build was heavily inspired by a YouTube video by Ben Eater:

This video shows how to build a 4-bit version of mine with a lot more detail than what I can do with a web page. I have made a few changes on my version though. first I have replaced the 2 DIP switches on his to 6 push buttons on my project, this is because I don't have any DIP switches right now. I have also moved all the outputs to another breadboard because the bigger one ran out of space. In Ben Eater's video, he used a spool of wire that he cut up, but I can't find any that is thick enough and has a single core. The reason it has to has a single core is so that it is easier to but in the breadboard. If anyone knows where I can get some of the wire please comment it down below.