Model a thing that can be deformed through 3 or more blendshapes (aka shape keys).
Transfer it to the engine so it can be animated dynamically with oscillations or sound analysis.
– use only one mesh
– the thing can be object, plant, landscape, creature, abstract shape. If it’s a creature avoid using blendshapes for things that should be done with bone deformation (bending limbs etc) or lip synching (that’s potentially another exercise).
– if it uses sound try to establish a meaningful relationship between sound and shape of the thing (i.e. not just a dancing character)
– sketch the 3 blendshapes first
– there should be no state in which the deformations “break” the mesh (self intersecting surface, unwanted glitches)
Tutorial
Morphing object – how to use the template above