http://store.steampowered.com/app/745580/Wonderstructs__Part_Expansion_Pack/
Click on picture right above in widget to get more info.
Just a quick short announcement that the Wonderstructs Part Pack will be available on December 11th. It will be $0.99.
You can build fun stuff with the new Wonderstruct parts..
Integrates with all of the other Contraption Maker parts to build contraptions as large as you want.
Comes with many Wonderstructs parts.
Waldo and Tinker in the Wonderstructs basement.
Has two layers so you can create crossovers like this loop
Based upon the real world Wonderstructs.
You read all about them at their website:
http://www.wonderstructs.com/