This is a really nice paper craft book that allows you to build a trio of droids. These are versions of the droids that will be seen in The Force Awakens so C3-po has a red arm and their is an updated version of BB-8.
In the back of the kit there is is also a Droid Factory Handbook that gives us informational stats on R2, C-3PO, BB-8, Chopper, Battle Droids and more.
I'll confess to not being the craftiest of people but putting these droids together seems pretty straight forward. I will be sharing my results on twitter at @yogikai