When working with fake fur, I make sure the fur is combed away from the stitching line so when I stitch, the fur isn’t caught in the seam. Back stitching at the start and end is a good idea. If the weave of the fabric under the fur is dense, a regular stitch length is fine. If it is flimsy, decrease your stitch length. Child safe toy must have no removable pieces that could pose a choking hazard. Embroider the feature if your pattern calls for them.