First of all you have to buy some FIMO modelling clay or something similar in the colours you like ( maybe you want to have a purple cow !? ).
Then you need a toothpick and a cutterknife ( or something similar ).
You need the following pieces:
Arrange the feet like these:
Attach the body to the feet:
Form the tail:
Stick the tail against the body:
Form the head:
Use the toothpick and the knife to cut the mouth and form the nose:
Attach the head to the body:
Attach the ears to the head:
Attach the first part of the eyes to the head:
Attach the second part of the eyes to the head:
Form the horn:
Attach the horn to the head and bend it in shape ( Now the cow is finished ):