To use it, download the appropriate version's .jar file and place it into your Minecraft %appdata%\.minecraft\mods folder.
The request for a "Blueprint jar" can refer to several distinct things, ranging from a Minecraft technical library to physical crafting activities like a "Story Jar." 1. Minecraft "Blueprint" Jar File Download Blueprint jar
If your goal is to "develop a story" using a physical "Story Jar" (sometimes called a "Story in a Jar"), this is a creative activity used to spark imagination. Tell a Story in a Jar! | Activity - Education.com To use it, download the appropriate version's