Create an image of a whimsical cartoon squirrel. The character should have large, expressive eyes and a small, friendly smile. The proportions should be exaggerated with a large head, small body, and fluffy tail. The colors are to be bright and solid, with clean, smooth lines and no shading, giving it a simple yet endearing appearance. The overall feel should be cheerful and appealing to children, reminiscent of modern animated series. The character should exude warmth and friendliness, standing in a casual pose with an inviting gesture, set against a white background.  --s 250