Which Material?

When creating stop motion it seems there are a few options in the way of material in which you can create your subjects, characters, and sets. The most famous are of course clay or plasticine as it is very adaptable and can be molded into a very large variety of shapes. Stop- Motion studios will often spend months designing the characters every facial expression and pose into clay as the possibilities are very wide. Despite this I have decided against using clay or plasticine for my own stop motion project as I find it is quite expensive if one wishes to use a large variety of colours and also because I lack experience in sculpting and modeling clay which will mean my stop motion would most likely look like a lot of messy blobs rather than actual characters.

Instead I found a cheaper and more efficient material for myself when browsing youtube for stop motion tutorials.
LEGO has taken off in the amateur stop motion world and there are many videos all over the likes of Youtube of people creating scenes with this brand of toy. It is not only already in shape and does not need to be sculpted or molded but also comes with pre-built characters with facial expressions. Although it could still be considered quite expensive I do already have access to some lego which I could use.
The main flaw with using lego is because it is plastic and pre-molded, the movement you can perform with these figures is more restricted than that of clay. The arms of the figures only move in one direction and a lego figures face cannot move at all.