I didn't realize the names of them until I checked them in the store to post that comment, it is a little misleading though.
Each box has a summoner Icon, a blueprint to unlock the project skin borders, a project core, and an augment cashe fragment.
It can be a little confusing, but I think riot did a fairly good job summarizing it here http://boards.na.leagueoflegends.com/en/c/miscellaneous/E2ArVn9s-project-holy-shit-theres-a-lot-going-on-lets-break-this-down
I'm not sure if I'm reading your initial question correctly, but just to clarify, the blueprints are only for the project skin borders. The skins themselves you need to either buy with RP, or get lucky and get one from a normal hextech chest.