This appears to be a box of real fur covered mice just like the ones my cats LOVED. They are about the same size as real house mice, and the cats had great fun catching them and batting them around. Unfortunately, my young marmalade cat swallowed one. The fur digested nicely but the plastic core got stuck in his stomach. The good news is the core didn't obstruct his intestines. The bad news is the emergency care, x-rays, unsuccessful attempt at induced vomiting and the abdominal surgery finally required cost $3,000. As much as the cats love these, we will never have them in our home again. If you buy them or have them, don't let your cats play with them unsupervised and take regular mouse attendance.