Very interesting. For the woman, I'd say that the eyelids are a little too defined, perhaps just use a kneadable eraser to tone them down a bit. It may just be me but it kind of looks like her eyes are looking at different things. I like the cat from alice in wonderland, the eyes are very well done, the shading and reflections add a nice depth to them. As for the dino, the bottom row towards the end of the mouth almost looks like a crystal cavern, maybe get rid of a few extraneous teeth? And the frog, I really don't have much to say about it, other than it's a unique concept.