Ok some advice I have if u want to make it easy and simple use this program:
http://www.stuffbydavid.com/mineimatorIts easy and simple. But in the end doesnt look so good >.>
I dont really recommend it... but eh!
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Heres another one that most people know. Blender. I never used it before but its free so its ok.
But I also hear its really complicated for rigs and that stuff so gonna take longer, but results are gonna be better
http://www.blender.org/================================================
And last but not least Cinema 4D! Basically all of the above Simple and awesome. results are awesome. and very simple to use. But ofc when rendering it, u need a beefy computer or else It will take hours just to render it.
Ik its kinda pricy but u could always get an ilegal version :/
http://www.maxon.net/products/cinema-4d-studio/===========================================
Thats is if you want animations like Slamacow.
Thats all the advice I can give you on which program to use...
For Ideas I dont have any :/
maybe like people krafting stuff u can only kraft in KraftZone. idk lol.
Good Luck with the project!