Marzy,
this is clever, the way you've incorporated a C element in #16, and the shape and of the head and forehead gives a sense of A too. I'm going to dwell on this a bit more and will give you further feedback tomorrow, and after I've talked with my colleagues
A couple of immediate comments. I'm kind of regretting that in the original brief I weighted the design slightly to serious over playful. I am thinking that a good mascot should have some playfulness in it. Michelin Man is still playful isn't he, even though he's about serious and safe tyres. Your designs are quite severe, especially the white eye. The eye's a bit scary! Is there a way to make the logo more playful. Maybe even give a twinkle in the eye?
Many thanks, Peter