Jack in a Box is a release file of the Minecraft mod Jack in a box, made for Minecraft 1.12-Snapshot. It was published on May 17, 2017 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Jack in a box mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.