Hi there , I´m from germany and I´m looking for a learning DVD for Houdini 12 . I wonder where I can find it .

There are loads of learning materials, use the sidefx site for the basics and maybe cmiVFX, 3dbuzz etc for other more in depth tutorials

I peronsally really like:

cmiVFX (becareful, there are some VERY complex tuts here and will overwhelm you as a beginner

http://www.sidefx.com/index.php?option=com_content&task=view&id=1846&Itemid=351 [sidefx.com]

http://cg.tutsplus.com/tutorials/side-effects-houdini/3d_cg_houdini_sidefx_modeling_asset_vfx_workflow_autofence1/ [cg.tutsplus.com]

http://www.3dbuzz.com/vbforum/sv_showvideo.php?v=668 [3dbuzz.com]

While they are not DVD's who wants something in the mail. online video's are so much better!