Wallace and Gromit By Aardman studios
This Stop motion is made is the style of clay animation so using clay to form the characters and later for the movies had metal frames inside. Clay animation was used back in 1908 and each object was clay or plasticine. Normally a film runs at 24 frames a second therefore for most claymation they did 12 movements in a frame and taking two shots per change to give the smooth movement of the clay/plasticine. There are other forms which can be complicated such as Strata-Cut animation
This type of claymation is where you cut way from the start similar to a rock stick (candy) or a loaf of beard but in this case a loaf of clay which you cut way and take pictures as you go along; now this to me seems like a art in it self and people who have knowledge can do it!
Finally there is 'freeform' which looks fun because it's a informal way to make a claymation and has radical changes an example I think would be Morph from the show art attack