PIG:

Frost the cupcake with pink frosting.

Frost a marshmallow pink for the snout and use black food coloring gel or frosting to make its nostrils. (I only had mini marshmallows, but it would probably look better with a normal/large one)

Use half a mini marshmallow for each eye and add the pupils the same way you added the nostrils.

Use half a mini marshmallow and cover it with pink frosting for the ears (I messed with mine a little to give the ears a point)

Add a mouth and you're done!

TIGER/LION

Frost the cupcake orange (or orange).

Tear off a piece of a marshmallow, shape it into a triangle, and frost it pink for the nose.

Do the same thing for the eyes and ears like you did with the pig.

Add whiskers using black gel food coloring or frosting.

Add a smile and you're done!