For your reference, here is a Google spreadsheet of links to Official littleBits Inventions and kit booklets, organized by kit.
Official littleBits Inventions by Kit
The 11 kits included in the Google spreadsheet are:
Gizmos & Gadgets Kit, 2nd Edition
Gizmos & Gadgets Kit
Rule Your Room Kit
STEAM Student Set
Smart Home Kit
Arduino Coding Kit
I hope you find this reference tool helpful when planning invention based activities.