Plastic or paper
But in all seriousness, Blender is great, although it is indeed a little tricky to learn, as others have said. But IMO it is VERY worth learning because it is a versatile program.
The newer version of Blender are definitely easier to learn than the older versions. Just keep in mind that the majority of functions/buttons in the program aren't relevant to Blockland modding, so just take it slow and try not to feel overwhelmed.
As Ozmar mentioned, Blender Cookie is a great place to start for tutorials. I recommend starting with a tutorial covering the UI at least.
Blender Guru is another great source of tutorials. A large portion of their tutorials are geared more toward rendering and artistic stuff, but they still have some stuff relevant to Blockland modding.
