I would like to place this Duplo pig directly on Lego bricks/pieces. I tried an intermediate Duplo 2x4 plate with Lego bricks underneath, but it doesn't look good. The problem is that Duplo feet surround the studs. Therefore, Duplo feet don't fit onto Lego studs. Is there an elegant way to connect Duplo animals' feet with the Lego world?
@Uli found promising solutions, one of them is to use the Technic Engine Piston Round. It has some clutch power and at least transfers the issue into the regular LEGO world. Now I have to find a way to connect tow ball pieces to the rest of my MOC, Uli has provided some ideas.